/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:30:34,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:30:34,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:30:34,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 02:30:34,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 02:30:34,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 02:30:34,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 02:30:34,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 02:30:34,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 02:30:34,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 02:30:35,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 02:30:35,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 02:30:35,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:30:35,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:30:35,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:30:35,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:30:35,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:30:35,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:30:35,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:30:35,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:30:35,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:30:35,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:30:35,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:30:35,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:30:35,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:30:35,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:30:35,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:30:35,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:30:35,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:30:35,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:30:35,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:30:35,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:30:35,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:30:35,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:30:35,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:30:35,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:30:35,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:30:35,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:30:35,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:30:35,154 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:30:35,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:30:35,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:30:35,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:30:35,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:30:35,156 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:30:35,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:30:35,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:30:35,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:30:35,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:30:35,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:30:35,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:30:35,158 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:30:35,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:30:35,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:30:35,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:30:35,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:30:35,753 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:30:35,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-10-24 02:30:35,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae99edde3/a511aa476c6444dea89d0174c2d96b25/FLAG52e79c034 [2020-10-24 02:30:37,017 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:30:37,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-10-24 02:30:37,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae99edde3/a511aa476c6444dea89d0174c2d96b25/FLAG52e79c034 [2020-10-24 02:30:37,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae99edde3/a511aa476c6444dea89d0174c2d96b25 [2020-10-24 02:30:37,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:30:37,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:30:37,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:30:37,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:30:37,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:30:37,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:37,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2784433e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37, skipping insertion in model container [2020-10-24 02:30:37,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:37,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:30:37,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:30:37,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:30:37,749 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:30:37,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:30:37,925 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:30:37,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37 WrapperNode [2020-10-24 02:30:37,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:30:37,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:30:37,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:30:37,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:30:37,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:37,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:37,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:37,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:38,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:38,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:38,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... [2020-10-24 02:30:38,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:30:38,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:30:38,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:30:38,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:30:38,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-24 02:30:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:30:38,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:30:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:30:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:30:38,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:30:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:30:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:30:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:30:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-10-24 02:30:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-24 02:30:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:30:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:30:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:30:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 02:30:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:30:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:30:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:30:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:30:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:30:38,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 02:30:39,944 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:30:39,945 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 02:30:39,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:30:39 BoogieIcfgContainer [2020-10-24 02:30:39,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:30:39,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:30:39,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:30:39,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:30:39,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:30:37" (1/3) ... [2020-10-24 02:30:39,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4112f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:30:39, skipping insertion in model container [2020-10-24 02:30:39,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:30:37" (2/3) ... [2020-10-24 02:30:39,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4112f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:30:39, skipping insertion in model container [2020-10-24 02:30:39,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:30:39" (3/3) ... [2020-10-24 02:30:39,968 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-10-24 02:30:39,999 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:30:40,008 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:30:40,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:30:40,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:30:40,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:30:40,089 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:30:40,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:30:40,091 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:30:40,091 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:30:40,091 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:30:40,091 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:30:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states. [2020-10-24 02:30:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-24 02:30:40,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:40,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:40,158 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash 873587710, now seen corresponding path program 1 times [2020-10-24 02:30:40,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:40,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673430476] [2020-10-24 02:30:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:41,396 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:30:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673430476] [2020-10-24 02:30:41,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:30:41,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:30:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904802594] [2020-10-24 02:30:41,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:30:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:30:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:30:41,952 INFO L87 Difference]: Start difference. First operand 356 states. Second operand 6 states. [2020-10-24 02:30:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:43,796 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-10-24 02:30:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:30:43,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 323 [2020-10-24 02:30:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:43,845 INFO L225 Difference]: With dead ends: 395 [2020-10-24 02:30:43,846 INFO L226 Difference]: Without dead ends: 355 [2020-10-24 02:30:43,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:30:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-24 02:30:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 336. [2020-10-24 02:30:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:30:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 337 transitions. [2020-10-24 02:30:43,996 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 337 transitions. Word has length 323 [2020-10-24 02:30:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:43,998 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 337 transitions. [2020-10-24 02:30:43,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:30:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 337 transitions. [2020-10-24 02:30:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-24 02:30:44,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:44,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:44,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:30:44,010 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1259668514, now seen corresponding path program 1 times [2020-10-24 02:30:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:44,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689607056] [2020-10-24 02:30:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:44,533 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:30:44,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:44,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689607056] [2020-10-24 02:30:44,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:30:44,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:30:44,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254587504] [2020-10-24 02:30:44,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:30:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:30:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:30:44,760 INFO L87 Difference]: Start difference. First operand 336 states and 337 transitions. Second operand 5 states. [2020-10-24 02:30:45,020 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-24 02:30:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:46,423 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2020-10-24 02:30:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:30:46,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-24 02:30:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:46,429 INFO L225 Difference]: With dead ends: 381 [2020-10-24 02:30:46,430 INFO L226 Difference]: Without dead ends: 355 [2020-10-24 02:30:46,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:30:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-24 02:30:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 341. [2020-10-24 02:30:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-24 02:30:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2020-10-24 02:30:46,478 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 323 [2020-10-24 02:30:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:46,479 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2020-10-24 02:30:46,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:30:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2020-10-24 02:30:46,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-24 02:30:46,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:46,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:30:46,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1311604414, now seen corresponding path program 1 times [2020-10-24 02:30:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:46,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398236387] [2020-10-24 02:30:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:46,840 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:30:46,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:47,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398236387] [2020-10-24 02:30:47,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:47,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:30:47,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489650795] [2020-10-24 02:30:47,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:30:47,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:47,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:30:47,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:30:47,028 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand 6 states. [2020-10-24 02:30:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:48,841 INFO L93 Difference]: Finished difference Result 398 states and 401 transitions. [2020-10-24 02:30:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:30:48,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2020-10-24 02:30:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:48,846 INFO L225 Difference]: With dead ends: 398 [2020-10-24 02:30:48,846 INFO L226 Difference]: Without dead ends: 372 [2020-10-24 02:30:48,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:30:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-24 02:30:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2020-10-24 02:30:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-24 02:30:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-10-24 02:30:48,921 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 340 [2020-10-24 02:30:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:48,922 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-10-24 02:30:48,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:30:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-10-24 02:30:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-24 02:30:48,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:48,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:48,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:30:48,933 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash -750653346, now seen corresponding path program 2 times [2020-10-24 02:30:48,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:48,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839764983] [2020-10-24 02:30:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:49,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839764983] [2020-10-24 02:30:49,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:49,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:30:49,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110771140] [2020-10-24 02:30:49,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:30:49,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:30:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:30:49,497 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 7 states. [2020-10-24 02:30:49,717 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:30:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:51,504 INFO L93 Difference]: Finished difference Result 415 states and 418 transitions. [2020-10-24 02:30:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:30:51,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 357 [2020-10-24 02:30:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:51,511 INFO L225 Difference]: With dead ends: 415 [2020-10-24 02:30:51,512 INFO L226 Difference]: Without dead ends: 389 [2020-10-24 02:30:51,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:30:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-24 02:30:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-10-24 02:30:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-24 02:30:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 376 transitions. [2020-10-24 02:30:51,585 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 376 transitions. Word has length 357 [2020-10-24 02:30:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:51,587 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 376 transitions. [2020-10-24 02:30:51,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:30:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 376 transitions. [2020-10-24 02:30:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-24 02:30:51,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:51,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:51,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:30:51,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:51,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1632428862, now seen corresponding path program 3 times [2020-10-24 02:30:51,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:51,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793478678] [2020-10-24 02:30:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:52,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:52,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793478678] [2020-10-24 02:30:52,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:52,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:30:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362661498] [2020-10-24 02:30:52,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:30:52,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:52,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:30:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:30:52,296 INFO L87 Difference]: Start difference. First operand 375 states and 376 transitions. Second operand 8 states. [2020-10-24 02:30:52,536 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:30:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:54,375 INFO L93 Difference]: Finished difference Result 432 states and 435 transitions. [2020-10-24 02:30:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:30:54,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 374 [2020-10-24 02:30:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:54,382 INFO L225 Difference]: With dead ends: 432 [2020-10-24 02:30:54,382 INFO L226 Difference]: Without dead ends: 406 [2020-10-24 02:30:54,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:30:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-24 02:30:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 392. [2020-10-24 02:30:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-24 02:30:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 393 transitions. [2020-10-24 02:30:54,460 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 393 transitions. Word has length 374 [2020-10-24 02:30:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:54,462 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 393 transitions. [2020-10-24 02:30:54,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:30:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 393 transitions. [2020-10-24 02:30:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-24 02:30:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:54,469 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:54,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:30:54,470 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:54,471 INFO L82 PathProgramCache]: Analyzing trace with hash -549731106, now seen corresponding path program 4 times [2020-10-24 02:30:54,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:54,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903339315] [2020-10-24 02:30:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903339315] [2020-10-24 02:30:55,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:55,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:30:55,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065311366] [2020-10-24 02:30:55,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:30:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:30:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:30:55,260 INFO L87 Difference]: Start difference. First operand 392 states and 393 transitions. Second operand 9 states. [2020-10-24 02:30:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:57,350 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2020-10-24 02:30:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:30:57,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 391 [2020-10-24 02:30:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:57,356 INFO L225 Difference]: With dead ends: 449 [2020-10-24 02:30:57,356 INFO L226 Difference]: Without dead ends: 423 [2020-10-24 02:30:57,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:30:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-24 02:30:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 409. [2020-10-24 02:30:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-10-24 02:30:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 410 transitions. [2020-10-24 02:30:57,409 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 410 transitions. Word has length 391 [2020-10-24 02:30:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:57,410 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 410 transitions. [2020-10-24 02:30:57,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:30:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 410 transitions. [2020-10-24 02:30:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-10-24 02:30:57,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:57,415 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:57,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:30:57,416 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -66267070, now seen corresponding path program 5 times [2020-10-24 02:30:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:57,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259530007] [2020-10-24 02:30:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:57,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:58,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259530007] [2020-10-24 02:30:58,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:58,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:30:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995464784] [2020-10-24 02:30:58,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:30:58,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:30:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:30:58,131 INFO L87 Difference]: Start difference. First operand 409 states and 410 transitions. Second operand 10 states. [2020-10-24 02:30:58,336 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:00,635 INFO L93 Difference]: Finished difference Result 466 states and 469 transitions. [2020-10-24 02:31:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:31:00,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 408 [2020-10-24 02:31:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:00,643 INFO L225 Difference]: With dead ends: 466 [2020-10-24 02:31:00,644 INFO L226 Difference]: Without dead ends: 440 [2020-10-24 02:31:00,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:31:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-24 02:31:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2020-10-24 02:31:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-24 02:31:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2020-10-24 02:31:00,702 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 408 [2020-10-24 02:31:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:00,703 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2020-10-24 02:31:00,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:31:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2020-10-24 02:31:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-24 02:31:00,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:00,709 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:00,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:31:00,710 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1742702242, now seen corresponding path program 6 times [2020-10-24 02:31:00,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:00,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384998502] [2020-10-24 02:31:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 30 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:01,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384998502] [2020-10-24 02:31:01,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:01,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:31:01,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844340550] [2020-10-24 02:31:01,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:31:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:31:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:31:01,570 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand 11 states. [2020-10-24 02:31:01,825 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:04,265 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2020-10-24 02:31:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:31:04,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 425 [2020-10-24 02:31:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:04,272 INFO L225 Difference]: With dead ends: 483 [2020-10-24 02:31:04,272 INFO L226 Difference]: Without dead ends: 457 [2020-10-24 02:31:04,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:31:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-24 02:31:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 443. [2020-10-24 02:31:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-24 02:31:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 444 transitions. [2020-10-24 02:31:04,336 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 444 transitions. Word has length 425 [2020-10-24 02:31:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:04,337 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 444 transitions. [2020-10-24 02:31:04,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:31:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 444 transitions. [2020-10-24 02:31:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-10-24 02:31:04,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:04,344 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:04,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:31:04,345 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2087210046, now seen corresponding path program 7 times [2020-10-24 02:31:04,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:04,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082904726] [2020-10-24 02:31:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:04,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 35 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:05,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082904726] [2020-10-24 02:31:05,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:05,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:31:05,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891222461] [2020-10-24 02:31:05,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:31:05,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:31:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:31:05,372 INFO L87 Difference]: Start difference. First operand 443 states and 444 transitions. Second operand 12 states. [2020-10-24 02:31:05,616 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:08,276 INFO L93 Difference]: Finished difference Result 500 states and 503 transitions. [2020-10-24 02:31:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:31:08,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 442 [2020-10-24 02:31:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:08,283 INFO L225 Difference]: With dead ends: 500 [2020-10-24 02:31:08,284 INFO L226 Difference]: Without dead ends: 474 [2020-10-24 02:31:08,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:31:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-24 02:31:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 460. [2020-10-24 02:31:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-24 02:31:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-10-24 02:31:08,352 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 442 [2020-10-24 02:31:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:08,354 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-10-24 02:31:08,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:31:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-10-24 02:31:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-10-24 02:31:08,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:08,361 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:08,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:31:08,362 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash -348647970, now seen corresponding path program 8 times [2020-10-24 02:31:08,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:08,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448800626] [2020-10-24 02:31:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 40 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:09,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448800626] [2020-10-24 02:31:09,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:09,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-24 02:31:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574744270] [2020-10-24 02:31:09,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-24 02:31:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-24 02:31:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:31:09,426 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 13 states. [2020-10-24 02:31:09,652 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:12,582 INFO L93 Difference]: Finished difference Result 517 states and 520 transitions. [2020-10-24 02:31:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:31:12,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 459 [2020-10-24 02:31:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:12,587 INFO L225 Difference]: With dead ends: 517 [2020-10-24 02:31:12,587 INFO L226 Difference]: Without dead ends: 491 [2020-10-24 02:31:12,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:31:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-24 02:31:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 477. [2020-10-24 02:31:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-24 02:31:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 478 transitions. [2020-10-24 02:31:12,639 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 478 transitions. Word has length 459 [2020-10-24 02:31:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:12,640 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 478 transitions. [2020-10-24 02:31:12,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-24 02:31:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 478 transitions. [2020-10-24 02:31:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-10-24 02:31:12,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:12,645 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:12,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:31:12,645 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2129940670, now seen corresponding path program 9 times [2020-10-24 02:31:12,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:12,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925375734] [2020-10-24 02:31:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:13,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 45 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925375734] [2020-10-24 02:31:13,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:13,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:31:13,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26904535] [2020-10-24 02:31:13,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:31:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:31:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:31:13,639 INFO L87 Difference]: Start difference. First operand 477 states and 478 transitions. Second operand 14 states. [2020-10-24 02:31:13,900 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:17,433 INFO L93 Difference]: Finished difference Result 534 states and 537 transitions. [2020-10-24 02:31:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:31:17,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-10-24 02:31:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:17,448 INFO L225 Difference]: With dead ends: 534 [2020-10-24 02:31:17,449 INFO L226 Difference]: Without dead ends: 508 [2020-10-24 02:31:17,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:31:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-24 02:31:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-10-24 02:31:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-24 02:31:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 495 transitions. [2020-10-24 02:31:17,529 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 495 transitions. Word has length 476 [2020-10-24 02:31:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:17,531 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 495 transitions. [2020-10-24 02:31:17,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:31:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 495 transitions. [2020-10-24 02:31:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-24 02:31:17,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:17,539 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:17,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:31:17,540 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1942651486, now seen corresponding path program 10 times [2020-10-24 02:31:17,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:17,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826817154] [2020-10-24 02:31:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:18,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 50 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:18,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826817154] [2020-10-24 02:31:18,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:18,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:31:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373488056] [2020-10-24 02:31:18,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:31:18,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:31:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:31:18,700 INFO L87 Difference]: Start difference. First operand 494 states and 495 transitions. Second operand 15 states. [2020-10-24 02:31:18,924 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:22,389 INFO L93 Difference]: Finished difference Result 551 states and 554 transitions. [2020-10-24 02:31:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:31:22,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 493 [2020-10-24 02:31:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:22,394 INFO L225 Difference]: With dead ends: 551 [2020-10-24 02:31:22,394 INFO L226 Difference]: Without dead ends: 525 [2020-10-24 02:31:22,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:31:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-24 02:31:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 511. [2020-10-24 02:31:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-24 02:31:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 512 transitions. [2020-10-24 02:31:22,462 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 512 transitions. Word has length 493 [2020-10-24 02:31:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:22,463 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 512 transitions. [2020-10-24 02:31:22,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:31:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 512 transitions. [2020-10-24 02:31:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-10-24 02:31:22,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:22,470 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:22,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:31:22,471 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1377880770, now seen corresponding path program 11 times [2020-10-24 02:31:22,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:22,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19313974] [2020-10-24 02:31:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:23,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 55 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19313974] [2020-10-24 02:31:23,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:23,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:31:23,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637497326] [2020-10-24 02:31:23,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:31:23,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:31:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:31:23,585 INFO L87 Difference]: Start difference. First operand 511 states and 512 transitions. Second operand 16 states. [2020-10-24 02:31:23,816 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:27,656 INFO L93 Difference]: Finished difference Result 568 states and 571 transitions. [2020-10-24 02:31:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:31:27,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 510 [2020-10-24 02:31:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:27,662 INFO L225 Difference]: With dead ends: 568 [2020-10-24 02:31:27,662 INFO L226 Difference]: Without dead ends: 542 [2020-10-24 02:31:27,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:31:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-10-24 02:31:27,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 528. [2020-10-24 02:31:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-24 02:31:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 529 transitions. [2020-10-24 02:31:27,736 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 529 transitions. Word has length 510 [2020-10-24 02:31:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:27,737 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 529 transitions. [2020-10-24 02:31:27,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:31:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 529 transitions. [2020-10-24 02:31:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-10-24 02:31:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:27,742 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:27,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:31:27,743 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash -81799458, now seen corresponding path program 12 times [2020-10-24 02:31:27,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:27,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762619175] [2020-10-24 02:31:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 60 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762619175] [2020-10-24 02:31:28,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:28,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:31:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006975512] [2020-10-24 02:31:28,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:31:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:31:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:31:28,855 INFO L87 Difference]: Start difference. First operand 528 states and 529 transitions. Second operand 17 states. [2020-10-24 02:31:29,125 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:33,337 INFO L93 Difference]: Finished difference Result 585 states and 588 transitions. [2020-10-24 02:31:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:31:33,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 527 [2020-10-24 02:31:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:33,343 INFO L225 Difference]: With dead ends: 585 [2020-10-24 02:31:33,343 INFO L226 Difference]: Without dead ends: 559 [2020-10-24 02:31:33,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:31:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-10-24 02:31:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 545. [2020-10-24 02:31:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-24 02:31:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 546 transitions. [2020-10-24 02:31:33,423 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 546 transitions. Word has length 527 [2020-10-24 02:31:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:33,424 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 546 transitions. [2020-10-24 02:31:33,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:31:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 546 transitions. [2020-10-24 02:31:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-10-24 02:31:33,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:33,431 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:33,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:31:33,431 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash -426834366, now seen corresponding path program 13 times [2020-10-24 02:31:33,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:33,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690624767] [2020-10-24 02:31:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:34,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:34,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690624767] [2020-10-24 02:31:34,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:34,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:31:34,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096810660] [2020-10-24 02:31:34,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:31:34,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:34,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:31:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:31:34,883 INFO L87 Difference]: Start difference. First operand 545 states and 546 transitions. Second operand 18 states. [2020-10-24 02:31:35,122 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:39,673 INFO L93 Difference]: Finished difference Result 602 states and 605 transitions. [2020-10-24 02:31:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:31:39,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 544 [2020-10-24 02:31:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:39,678 INFO L225 Difference]: With dead ends: 602 [2020-10-24 02:31:39,679 INFO L226 Difference]: Without dead ends: 576 [2020-10-24 02:31:39,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:31:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-10-24 02:31:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 562. [2020-10-24 02:31:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-24 02:31:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 563 transitions. [2020-10-24 02:31:39,764 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 563 transitions. Word has length 544 [2020-10-24 02:31:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:39,765 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 563 transitions. [2020-10-24 02:31:39,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:31:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 563 transitions. [2020-10-24 02:31:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-10-24 02:31:39,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:39,774 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:39,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:31:39,774 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash -125826210, now seen corresponding path program 14 times [2020-10-24 02:31:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:39,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49112874] [2020-10-24 02:31:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:40,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 70 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:41,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49112874] [2020-10-24 02:31:41,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:41,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-24 02:31:41,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051923355] [2020-10-24 02:31:41,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-24 02:31:41,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-24 02:31:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:31:41,496 INFO L87 Difference]: Start difference. First operand 562 states and 563 transitions. Second operand 19 states. [2020-10-24 02:31:41,736 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:46,644 INFO L93 Difference]: Finished difference Result 619 states and 622 transitions. [2020-10-24 02:31:46,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:31:46,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 561 [2020-10-24 02:31:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:46,655 INFO L225 Difference]: With dead ends: 619 [2020-10-24 02:31:46,656 INFO L226 Difference]: Without dead ends: 593 [2020-10-24 02:31:46,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:31:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2020-10-24 02:31:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 579. [2020-10-24 02:31:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-24 02:31:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 580 transitions. [2020-10-24 02:31:46,762 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 580 transitions. Word has length 561 [2020-10-24 02:31:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:46,763 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 580 transitions. [2020-10-24 02:31:46,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-24 02:31:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 580 transitions. [2020-10-24 02:31:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-10-24 02:31:46,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:46,772 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:46,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:31:46,773 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1074684354, now seen corresponding path program 15 times [2020-10-24 02:31:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:46,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258913109] [2020-10-24 02:31:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1935 backedges. 75 proven. 1860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:48,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258913109] [2020-10-24 02:31:48,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:48,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:31:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861840750] [2020-10-24 02:31:48,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:31:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:31:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:31:48,307 INFO L87 Difference]: Start difference. First operand 579 states and 580 transitions. Second operand 20 states. [2020-10-24 02:31:48,564 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:31:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:53,993 INFO L93 Difference]: Finished difference Result 636 states and 639 transitions. [2020-10-24 02:31:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-24 02:31:53,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 578 [2020-10-24 02:31:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:53,999 INFO L225 Difference]: With dead ends: 636 [2020-10-24 02:31:54,000 INFO L226 Difference]: Without dead ends: 610 [2020-10-24 02:31:54,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:31:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-24 02:31:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 596. [2020-10-24 02:31:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-10-24 02:31:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 597 transitions. [2020-10-24 02:31:54,111 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 597 transitions. Word has length 578 [2020-10-24 02:31:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:54,113 INFO L481 AbstractCegarLoop]: Abstraction has 596 states and 597 transitions. [2020-10-24 02:31:54,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:31:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 597 transitions. [2020-10-24 02:31:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2020-10-24 02:31:54,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:54,121 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:54,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:31:54,121 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash 288563166, now seen corresponding path program 16 times [2020-10-24 02:31:54,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:54,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850351043] [2020-10-24 02:31:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 80 proven. 2120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:55,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850351043] [2020-10-24 02:31:55,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:55,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:31:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481433645] [2020-10-24 02:31:55,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:31:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:31:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:31:55,672 INFO L87 Difference]: Start difference. First operand 596 states and 597 transitions. Second operand 21 states. [2020-10-24 02:31:55,918 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:01,887 INFO L93 Difference]: Finished difference Result 653 states and 656 transitions. [2020-10-24 02:32:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:32:01,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 595 [2020-10-24 02:32:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:01,893 INFO L225 Difference]: With dead ends: 653 [2020-10-24 02:32:01,893 INFO L226 Difference]: Without dead ends: 627 [2020-10-24 02:32:01,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:32:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-24 02:32:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-10-24 02:32:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-10-24 02:32:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 614 transitions. [2020-10-24 02:32:01,993 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 614 transitions. Word has length 595 [2020-10-24 02:32:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:01,995 INFO L481 AbstractCegarLoop]: Abstraction has 613 states and 614 transitions. [2020-10-24 02:32:01,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:32:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 614 transitions. [2020-10-24 02:32:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2020-10-24 02:32:02,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:02,003 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:02,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:32:02,003 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -229188286, now seen corresponding path program 17 times [2020-10-24 02:32:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:02,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946990453] [2020-10-24 02:32:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:03,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2482 backedges. 85 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:03,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946990453] [2020-10-24 02:32:03,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:03,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:32:03,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582921873] [2020-10-24 02:32:03,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:32:03,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:03,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:32:03,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:32:03,649 INFO L87 Difference]: Start difference. First operand 613 states and 614 transitions. Second operand 22 states. [2020-10-24 02:32:03,910 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:10,235 INFO L93 Difference]: Finished difference Result 670 states and 673 transitions. [2020-10-24 02:32:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-24 02:32:10,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 612 [2020-10-24 02:32:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:10,241 INFO L225 Difference]: With dead ends: 670 [2020-10-24 02:32:10,242 INFO L226 Difference]: Without dead ends: 644 [2020-10-24 02:32:10,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:32:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-10-24 02:32:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 630. [2020-10-24 02:32:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-10-24 02:32:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 631 transitions. [2020-10-24 02:32:10,342 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 631 transitions. Word has length 612 [2020-10-24 02:32:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:10,343 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 631 transitions. [2020-10-24 02:32:10,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:32:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 631 transitions. [2020-10-24 02:32:10,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2020-10-24 02:32:10,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:10,352 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:10,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:32:10,353 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1736371106, now seen corresponding path program 18 times [2020-10-24 02:32:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:10,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503155102] [2020-10-24 02:32:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2781 backedges. 90 proven. 2691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503155102] [2020-10-24 02:32:12,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:12,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:32:12,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108201660] [2020-10-24 02:32:12,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:32:12,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:12,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:32:12,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:32:12,274 INFO L87 Difference]: Start difference. First operand 630 states and 631 transitions. Second operand 23 states. [2020-10-24 02:32:12,545 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:19,681 INFO L93 Difference]: Finished difference Result 687 states and 690 transitions. [2020-10-24 02:32:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:32:19,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 629 [2020-10-24 02:32:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:19,687 INFO L225 Difference]: With dead ends: 687 [2020-10-24 02:32:19,688 INFO L226 Difference]: Without dead ends: 661 [2020-10-24 02:32:19,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:32:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-24 02:32:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 647. [2020-10-24 02:32:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-10-24 02:32:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 648 transitions. [2020-10-24 02:32:19,821 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 648 transitions. Word has length 629 [2020-10-24 02:32:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:19,821 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 648 transitions. [2020-10-24 02:32:19,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:32:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 648 transitions. [2020-10-24 02:32:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2020-10-24 02:32:19,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:19,829 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:19,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:32:19,830 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1558153022, now seen corresponding path program 19 times [2020-10-24 02:32:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:19,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692395762] [2020-10-24 02:32:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:21,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 95 proven. 3002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:22,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692395762] [2020-10-24 02:32:22,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:22,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:32:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074914102] [2020-10-24 02:32:22,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:32:22,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:32:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:32:22,030 INFO L87 Difference]: Start difference. First operand 647 states and 648 transitions. Second operand 24 states. [2020-10-24 02:32:22,306 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:29,793 INFO L93 Difference]: Finished difference Result 704 states and 707 transitions. [2020-10-24 02:32:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:32:29,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 646 [2020-10-24 02:32:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:29,799 INFO L225 Difference]: With dead ends: 704 [2020-10-24 02:32:29,799 INFO L226 Difference]: Without dead ends: 678 [2020-10-24 02:32:29,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:32:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-10-24 02:32:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 664. [2020-10-24 02:32:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-10-24 02:32:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 665 transitions. [2020-10-24 02:32:29,885 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 665 transitions. Word has length 646 [2020-10-24 02:32:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:29,887 INFO L481 AbstractCegarLoop]: Abstraction has 664 states and 665 transitions. [2020-10-24 02:32:29,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:32:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 665 transitions. [2020-10-24 02:32:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2020-10-24 02:32:29,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:29,893 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:29,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:32:29,894 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash 263317726, now seen corresponding path program 20 times [2020-10-24 02:32:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:29,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984598730] [2020-10-24 02:32:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:31,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 100 proven. 3330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:32,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984598730] [2020-10-24 02:32:32,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:32,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:32:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460971412] [2020-10-24 02:32:32,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:32:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:32:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:32:32,194 INFO L87 Difference]: Start difference. First operand 664 states and 665 transitions. Second operand 25 states. [2020-10-24 02:32:32,471 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:40,853 INFO L93 Difference]: Finished difference Result 721 states and 724 transitions. [2020-10-24 02:32:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:32:40,856 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 663 [2020-10-24 02:32:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:40,860 INFO L225 Difference]: With dead ends: 721 [2020-10-24 02:32:40,860 INFO L226 Difference]: Without dead ends: 695 [2020-10-24 02:32:40,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:32:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2020-10-24 02:32:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 681. [2020-10-24 02:32:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2020-10-24 02:32:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 682 transitions. [2020-10-24 02:32:40,999 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 682 transitions. Word has length 663 [2020-10-24 02:32:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:41,001 INFO L481 AbstractCegarLoop]: Abstraction has 681 states and 682 transitions. [2020-10-24 02:32:41,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:32:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 682 transitions. [2020-10-24 02:32:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-10-24 02:32:41,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:41,013 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:41,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:32:41,014 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1977404350, now seen corresponding path program 21 times [2020-10-24 02:32:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:41,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675110312] [2020-10-24 02:32:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:42,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 105 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:43,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675110312] [2020-10-24 02:32:43,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:43,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:32:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974189032] [2020-10-24 02:32:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:32:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:32:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:32:43,308 INFO L87 Difference]: Start difference. First operand 681 states and 682 transitions. Second operand 26 states. [2020-10-24 02:32:43,584 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:32:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:52,669 INFO L93 Difference]: Finished difference Result 738 states and 741 transitions. [2020-10-24 02:32:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-24 02:32:52,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 680 [2020-10-24 02:32:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:52,675 INFO L225 Difference]: With dead ends: 738 [2020-10-24 02:32:52,675 INFO L226 Difference]: Without dead ends: 712 [2020-10-24 02:32:52,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:32:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-10-24 02:32:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 698. [2020-10-24 02:32:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-10-24 02:32:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 699 transitions. [2020-10-24 02:32:52,823 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 699 transitions. Word has length 680 [2020-10-24 02:32:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:52,824 INFO L481 AbstractCegarLoop]: Abstraction has 698 states and 699 transitions. [2020-10-24 02:32:52,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:32:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 699 transitions. [2020-10-24 02:32:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2020-10-24 02:32:52,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:52,835 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:52,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:32:52,836 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1509057186, now seen corresponding path program 22 times [2020-10-24 02:32:52,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:52,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452879314] [2020-10-24 02:32:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:54,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4147 backedges. 110 proven. 4037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452879314] [2020-10-24 02:32:55,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:55,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:32:55,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975290457] [2020-10-24 02:32:55,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:32:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:32:55,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:32:55,232 INFO L87 Difference]: Start difference. First operand 698 states and 699 transitions. Second operand 27 states. [2020-10-24 02:32:55,523 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:33:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:05,165 INFO L93 Difference]: Finished difference Result 755 states and 758 transitions. [2020-10-24 02:33:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:33:05,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 697 [2020-10-24 02:33:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:05,171 INFO L225 Difference]: With dead ends: 755 [2020-10-24 02:33:05,171 INFO L226 Difference]: Without dead ends: 729 [2020-10-24 02:33:05,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:33:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-10-24 02:33:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 715. [2020-10-24 02:33:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2020-10-24 02:33:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 716 transitions. [2020-10-24 02:33:05,321 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 716 transitions. Word has length 697 [2020-10-24 02:33:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:05,322 INFO L481 AbstractCegarLoop]: Abstraction has 715 states and 716 transitions. [2020-10-24 02:33:05,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:33:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 716 transitions. [2020-10-24 02:33:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2020-10-24 02:33:05,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:05,330 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:05,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:33:05,330 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash -250146878, now seen corresponding path program 23 times [2020-10-24 02:33:05,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:05,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898636417] [2020-10-24 02:33:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:07,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 115 proven. 4416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:07,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898636417] [2020-10-24 02:33:07,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:07,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:33:07,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868459402] [2020-10-24 02:33:07,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:33:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:33:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:33:07,937 INFO L87 Difference]: Start difference. First operand 715 states and 716 transitions. Second operand 28 states. [2020-10-24 02:33:08,239 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:33:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:18,861 INFO L93 Difference]: Finished difference Result 772 states and 775 transitions. [2020-10-24 02:33:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-24 02:33:18,864 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 714 [2020-10-24 02:33:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:18,868 INFO L225 Difference]: With dead ends: 772 [2020-10-24 02:33:18,868 INFO L226 Difference]: Without dead ends: 746 [2020-10-24 02:33:18,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:33:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-10-24 02:33:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 732. [2020-10-24 02:33:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2020-10-24 02:33:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 733 transitions. [2020-10-24 02:33:18,978 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 733 transitions. Word has length 714 [2020-10-24 02:33:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:18,979 INFO L481 AbstractCegarLoop]: Abstraction has 732 states and 733 transitions. [2020-10-24 02:33:18,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:33:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 733 transitions. [2020-10-24 02:33:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2020-10-24 02:33:18,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:18,989 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:18,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:33:18,990 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:18,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1193528866, now seen corresponding path program 24 times [2020-10-24 02:33:18,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:18,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114265392] [2020-10-24 02:33:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:20,992 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:33:20,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 120 proven. 4812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114265392] [2020-10-24 02:33:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:21,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:33:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156922898] [2020-10-24 02:33:21,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:33:21,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:33:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:33:21,599 INFO L87 Difference]: Start difference. First operand 732 states and 733 transitions. Second operand 29 states. [2020-10-24 02:33:21,891 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:33:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:33,384 INFO L93 Difference]: Finished difference Result 789 states and 792 transitions. [2020-10-24 02:33:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:33:33,388 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 731 [2020-10-24 02:33:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:33,392 INFO L225 Difference]: With dead ends: 789 [2020-10-24 02:33:33,393 INFO L226 Difference]: Without dead ends: 763 [2020-10-24 02:33:33,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:33:33,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-10-24 02:33:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 749. [2020-10-24 02:33:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-10-24 02:33:33,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 750 transitions. [2020-10-24 02:33:33,537 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 750 transitions. Word has length 731 [2020-10-24 02:33:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:33,538 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 750 transitions. [2020-10-24 02:33:33,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 02:33:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 750 transitions. [2020-10-24 02:33:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2020-10-24 02:33:33,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:33,548 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:33,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:33:33,549 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1280046270, now seen corresponding path program 25 times [2020-10-24 02:33:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:33,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280834439] [2020-10-24 02:33:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:35,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5350 backedges. 125 proven. 5225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:36,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280834439] [2020-10-24 02:33:36,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:36,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:33:36,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179999758] [2020-10-24 02:33:36,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:33:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:33:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:33:36,632 INFO L87 Difference]: Start difference. First operand 749 states and 750 transitions. Second operand 30 states. [2020-10-24 02:33:36,937 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:33:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:49,586 INFO L93 Difference]: Finished difference Result 806 states and 809 transitions. [2020-10-24 02:33:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-24 02:33:49,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 748 [2020-10-24 02:33:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:49,591 INFO L225 Difference]: With dead ends: 806 [2020-10-24 02:33:49,592 INFO L226 Difference]: Without dead ends: 780 [2020-10-24 02:33:49,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:33:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-24 02:33:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 766. [2020-10-24 02:33:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-24 02:33:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 767 transitions. [2020-10-24 02:33:49,698 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 767 transitions. Word has length 748 [2020-10-24 02:33:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:49,700 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 767 transitions. [2020-10-24 02:33:49,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:33:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 767 transitions. [2020-10-24 02:33:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-10-24 02:33:49,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:49,710 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:49,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:33:49,710 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1399170654, now seen corresponding path program 26 times [2020-10-24 02:33:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:49,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249792930] [2020-10-24 02:33:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:52,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5785 backedges. 130 proven. 5655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:52,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249792930] [2020-10-24 02:33:52,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:52,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:33:52,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878331804] [2020-10-24 02:33:52,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:33:52,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:33:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:33:52,796 INFO L87 Difference]: Start difference. First operand 766 states and 767 transitions. Second operand 31 states. [2020-10-24 02:33:53,118 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:34:06,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:06,643 INFO L93 Difference]: Finished difference Result 823 states and 826 transitions. [2020-10-24 02:34:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 02:34:06,645 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 765 [2020-10-24 02:34:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:06,649 INFO L225 Difference]: With dead ends: 823 [2020-10-24 02:34:06,650 INFO L226 Difference]: Without dead ends: 797 [2020-10-24 02:34:06,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:34:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2020-10-24 02:34:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 783. [2020-10-24 02:34:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2020-10-24 02:34:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 784 transitions. [2020-10-24 02:34:06,823 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 784 transitions. Word has length 765 [2020-10-24 02:34:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:06,824 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 784 transitions. [2020-10-24 02:34:06,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:34:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 784 transitions. [2020-10-24 02:34:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2020-10-24 02:34:06,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:06,832 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:06,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:34:06,833 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1078843710, now seen corresponding path program 27 times [2020-10-24 02:34:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:06,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108526355] [2020-10-24 02:34:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:09,358 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:34:09,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6237 backedges. 135 proven. 6102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:10,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108526355] [2020-10-24 02:34:10,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:34:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396097315] [2020-10-24 02:34:10,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:34:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:34:10,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:34:10,073 INFO L87 Difference]: Start difference. First operand 783 states and 784 transitions. Second operand 32 states. [2020-10-24 02:34:10,403 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:34:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:25,147 INFO L93 Difference]: Finished difference Result 840 states and 843 transitions. [2020-10-24 02:34:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-24 02:34:25,149 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 782 [2020-10-24 02:34:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:25,154 INFO L225 Difference]: With dead ends: 840 [2020-10-24 02:34:25,154 INFO L226 Difference]: Without dead ends: 814 [2020-10-24 02:34:25,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:34:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-10-24 02:34:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 800. [2020-10-24 02:34:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-10-24 02:34:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 801 transitions. [2020-10-24 02:34:25,294 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 801 transitions. Word has length 782 [2020-10-24 02:34:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:25,294 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 801 transitions. [2020-10-24 02:34:25,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:34:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 801 transitions. [2020-10-24 02:34:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2020-10-24 02:34:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:25,302 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:25,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:34:25,303 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:25,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1359873314, now seen corresponding path program 28 times [2020-10-24 02:34:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:25,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260427039] [2020-10-24 02:34:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:28,188 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:34:28,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 140 proven. 6566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:29,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260427039] [2020-10-24 02:34:29,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:29,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 02:34:29,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493367857] [2020-10-24 02:34:29,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 02:34:29,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 02:34:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:34:29,005 INFO L87 Difference]: Start difference. First operand 800 states and 801 transitions. Second operand 33 states. [2020-10-24 02:34:29,332 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:34:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:45,039 INFO L93 Difference]: Finished difference Result 857 states and 860 transitions. [2020-10-24 02:34:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:34:45,041 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 799 [2020-10-24 02:34:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:45,044 INFO L225 Difference]: With dead ends: 857 [2020-10-24 02:34:45,044 INFO L226 Difference]: Without dead ends: 831 [2020-10-24 02:34:45,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:34:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-10-24 02:34:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 817. [2020-10-24 02:34:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2020-10-24 02:34:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 818 transitions. [2020-10-24 02:34:45,223 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 818 transitions. Word has length 799 [2020-10-24 02:34:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:45,224 INFO L481 AbstractCegarLoop]: Abstraction has 817 states and 818 transitions. [2020-10-24 02:34:45,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 02:34:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 818 transitions. [2020-10-24 02:34:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-10-24 02:34:45,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:45,234 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:45,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:34:45,235 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1798741438, now seen corresponding path program 29 times [2020-10-24 02:34:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:45,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153213215] [2020-10-24 02:34:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:48,241 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:34:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 145 proven. 7047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153213215] [2020-10-24 02:34:49,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:49,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:34:49,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859034774] [2020-10-24 02:34:49,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:34:49,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:34:49,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:34:49,084 INFO L87 Difference]: Start difference. First operand 817 states and 818 transitions. Second operand 34 states. [2020-10-24 02:34:49,429 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:35:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:06,858 INFO L93 Difference]: Finished difference Result 874 states and 877 transitions. [2020-10-24 02:35:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-24 02:35:06,860 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 816 [2020-10-24 02:35:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:06,865 INFO L225 Difference]: With dead ends: 874 [2020-10-24 02:35:06,866 INFO L226 Difference]: Without dead ends: 848 [2020-10-24 02:35:06,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:35:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-10-24 02:35:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 834. [2020-10-24 02:35:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-24 02:35:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 835 transitions. [2020-10-24 02:35:07,025 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 835 transitions. Word has length 816 [2020-10-24 02:35:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:07,026 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 835 transitions. [2020-10-24 02:35:07,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:35:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 835 transitions. [2020-10-24 02:35:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-10-24 02:35:07,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:07,034 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:07,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:35:07,035 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1295437986, now seen corresponding path program 30 times [2020-10-24 02:35:07,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:07,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717954003] [2020-10-24 02:35:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:10,106 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:35:10,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7695 backedges. 150 proven. 7545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:11,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717954003] [2020-10-24 02:35:11,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:11,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 02:35:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098369479] [2020-10-24 02:35:11,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 02:35:11,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 02:35:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:35:11,007 INFO L87 Difference]: Start difference. First operand 834 states and 835 transitions. Second operand 35 states. [2020-10-24 02:35:11,339 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:35:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:29,651 INFO L93 Difference]: Finished difference Result 891 states and 894 transitions. [2020-10-24 02:35:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:35:29,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 833 [2020-10-24 02:35:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:29,657 INFO L225 Difference]: With dead ends: 891 [2020-10-24 02:35:29,658 INFO L226 Difference]: Without dead ends: 865 [2020-10-24 02:35:29,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:35:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-10-24 02:35:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 851. [2020-10-24 02:35:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 851 states. [2020-10-24 02:35:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 852 transitions. [2020-10-24 02:35:29,799 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 852 transitions. Word has length 833 [2020-10-24 02:35:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:29,800 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 852 transitions. [2020-10-24 02:35:29,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 02:35:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 852 transitions. [2020-10-24 02:35:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-10-24 02:35:29,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:29,810 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:29,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:35:29,811 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash -994984510, now seen corresponding path program 31 times [2020-10-24 02:35:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:29,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284759899] [2020-10-24 02:35:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:33,764 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:35:33,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8215 backedges. 155 proven. 8060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:34,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284759899] [2020-10-24 02:35:34,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:34,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:35:34,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592291069] [2020-10-24 02:35:34,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:35:34,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:35:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:35:34,667 INFO L87 Difference]: Start difference. First operand 851 states and 852 transitions. Second operand 36 states. [2020-10-24 02:35:35,091 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:35:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:55,013 INFO L93 Difference]: Finished difference Result 908 states and 911 transitions. [2020-10-24 02:35:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:35:55,015 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 850 [2020-10-24 02:35:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:55,020 INFO L225 Difference]: With dead ends: 908 [2020-10-24 02:35:55,020 INFO L226 Difference]: Without dead ends: 882 [2020-10-24 02:35:55,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-24 02:35:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2020-10-24 02:35:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 868. [2020-10-24 02:35:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2020-10-24 02:35:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 869 transitions. [2020-10-24 02:35:55,192 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 869 transitions. Word has length 850 [2020-10-24 02:35:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:55,193 INFO L481 AbstractCegarLoop]: Abstraction has 868 states and 869 transitions. [2020-10-24 02:35:55,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:35:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 869 transitions. [2020-10-24 02:35:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2020-10-24 02:35:55,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:55,204 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:55,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:35:55,204 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1949516766, now seen corresponding path program 32 times [2020-10-24 02:35:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:55,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042540214] [2020-10-24 02:35:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:58,969 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:35:58,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8752 backedges. 160 proven. 8592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042540214] [2020-10-24 02:35:59,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:59,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 02:35:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891958350] [2020-10-24 02:35:59,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 02:35:59,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 02:35:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:35:59,916 INFO L87 Difference]: Start difference. First operand 868 states and 869 transitions. Second operand 37 states. [2020-10-24 02:36:00,312 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:36:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:21,199 INFO L93 Difference]: Finished difference Result 925 states and 928 transitions. [2020-10-24 02:36:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 02:36:21,200 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 867 [2020-10-24 02:36:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:21,204 INFO L225 Difference]: With dead ends: 925 [2020-10-24 02:36:21,205 INFO L226 Difference]: Without dead ends: 899 [2020-10-24 02:36:21,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:36:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-24 02:36:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 885. [2020-10-24 02:36:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2020-10-24 02:36:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 886 transitions. [2020-10-24 02:36:21,364 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 886 transitions. Word has length 867 [2020-10-24 02:36:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:21,366 INFO L481 AbstractCegarLoop]: Abstraction has 885 states and 886 transitions. [2020-10-24 02:36:21,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 02:36:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 886 transitions. [2020-10-24 02:36:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-10-24 02:36:21,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:21,382 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:36:21,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:36:21,382 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1931688258, now seen corresponding path program 33 times [2020-10-24 02:36:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:21,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953547507] [2020-10-24 02:36:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:25,400 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:36:25,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9306 backedges. 165 proven. 9141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:36:26,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953547507] [2020-10-24 02:36:26,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:26,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:36:26,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007260941] [2020-10-24 02:36:26,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:36:26,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:36:26,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:36:26,383 INFO L87 Difference]: Start difference. First operand 885 states and 886 transitions. Second operand 38 states. [2020-10-24 02:36:26,780 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:36:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:49,300 INFO L93 Difference]: Finished difference Result 942 states and 945 transitions. [2020-10-24 02:36:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 02:36:49,302 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 884 [2020-10-24 02:36:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:49,307 INFO L225 Difference]: With dead ends: 942 [2020-10-24 02:36:49,308 INFO L226 Difference]: Without dead ends: 916 [2020-10-24 02:36:49,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2020-10-24 02:36:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2020-10-24 02:36:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 902. [2020-10-24 02:36:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-10-24 02:36:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 903 transitions. [2020-10-24 02:36:49,545 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 903 transitions. Word has length 884 [2020-10-24 02:36:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:49,546 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 903 transitions. [2020-10-24 02:36:49,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:36:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 903 transitions. [2020-10-24 02:36:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2020-10-24 02:36:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:49,556 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:36:49,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:36:49,556 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1233635234, now seen corresponding path program 34 times [2020-10-24 02:36:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92820976] [2020-10-24 02:36:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:53,858 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:36:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9877 backedges. 170 proven. 9707 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:36:54,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92820976] [2020-10-24 02:36:54,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:54,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:36:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745941132] [2020-10-24 02:36:54,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:36:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:54,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:36:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:36:54,909 INFO L87 Difference]: Start difference. First operand 902 states and 903 transitions. Second operand 39 states. [2020-10-24 02:36:55,458 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:37:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:37:21,325 INFO L93 Difference]: Finished difference Result 959 states and 962 transitions. [2020-10-24 02:37:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:37:21,327 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 901 [2020-10-24 02:37:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:37:21,332 INFO L225 Difference]: With dead ends: 959 [2020-10-24 02:37:21,332 INFO L226 Difference]: Without dead ends: 933 [2020-10-24 02:37:21,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2020-10-24 02:37:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-10-24 02:37:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 919. [2020-10-24 02:37:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-10-24 02:37:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 920 transitions. [2020-10-24 02:37:21,566 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 920 transitions. Word has length 901 [2020-10-24 02:37:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:37:21,567 INFO L481 AbstractCegarLoop]: Abstraction has 919 states and 920 transitions. [2020-10-24 02:37:21,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:37:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 920 transitions. [2020-10-24 02:37:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2020-10-24 02:37:21,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:37:21,578 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:37:21,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:37:21,578 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:37:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:37:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -707406654, now seen corresponding path program 35 times [2020-10-24 02:37:21,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:37:21,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017532012] [2020-10-24 02:37:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:37:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:25,892 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:37:25,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 175 proven. 10290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017532012] [2020-10-24 02:37:27,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:27,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:37:27,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201511324] [2020-10-24 02:37:27,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:37:27,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:37:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:37:27,002 INFO L87 Difference]: Start difference. First operand 919 states and 920 transitions. Second operand 40 states. [2020-10-24 02:37:27,400 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:37:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:37:51,861 INFO L93 Difference]: Finished difference Result 976 states and 979 transitions. [2020-10-24 02:37:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-24 02:37:51,863 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 918 [2020-10-24 02:37:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:37:51,868 INFO L225 Difference]: With dead ends: 976 [2020-10-24 02:37:51,868 INFO L226 Difference]: Without dead ends: 950 [2020-10-24 02:37:51,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 02:37:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-10-24 02:37:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 936. [2020-10-24 02:37:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-10-24 02:37:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 937 transitions. [2020-10-24 02:37:52,034 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 937 transitions. Word has length 918 [2020-10-24 02:37:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:37:52,035 INFO L481 AbstractCegarLoop]: Abstraction has 936 states and 937 transitions. [2020-10-24 02:37:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:37:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 937 transitions. [2020-10-24 02:37:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2020-10-24 02:37:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:37:52,045 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:37:52,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:37:52,045 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:37:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:37:52,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1793068254, now seen corresponding path program 36 times [2020-10-24 02:37:52,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:37:52,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685770561] [2020-10-24 02:37:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:37:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11070 backedges. 180 proven. 10890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:56,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685770561] [2020-10-24 02:37:56,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 02:37:56,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419661962] [2020-10-24 02:37:56,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 02:37:56,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:56,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 02:37:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:37:56,286 INFO L87 Difference]: Start difference. First operand 936 states and 937 transitions. Second operand 41 states. [2020-10-24 02:37:56,606 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:38:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:16,457 INFO L93 Difference]: Finished difference Result 993 states and 996 transitions. [2020-10-24 02:38:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 02:38:16,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 935 [2020-10-24 02:38:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:16,465 INFO L225 Difference]: With dead ends: 993 [2020-10-24 02:38:16,465 INFO L226 Difference]: Without dead ends: 967 [2020-10-24 02:38:16,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:38:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-10-24 02:38:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 953. [2020-10-24 02:38:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-10-24 02:38:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 954 transitions. [2020-10-24 02:38:16,627 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 954 transitions. Word has length 935 [2020-10-24 02:38:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:16,628 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 954 transitions. [2020-10-24 02:38:16,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 02:38:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 954 transitions. [2020-10-24 02:38:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2020-10-24 02:38:16,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:16,635 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:16,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:38:16,636 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1266577342, now seen corresponding path program 37 times [2020-10-24 02:38:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:16,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360547088] [2020-10-24 02:38:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:20,183 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:38:20,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11692 backedges. 185 proven. 11507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:21,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360547088] [2020-10-24 02:38:21,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:21,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:38:21,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743335261] [2020-10-24 02:38:21,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:38:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:38:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:38:21,218 INFO L87 Difference]: Start difference. First operand 953 states and 954 transitions. Second operand 42 states. [2020-10-24 02:38:21,544 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:38:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:38:42,684 INFO L93 Difference]: Finished difference Result 1010 states and 1013 transitions. [2020-10-24 02:38:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-24 02:38:42,686 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 952 [2020-10-24 02:38:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:38:42,690 INFO L225 Difference]: With dead ends: 1010 [2020-10-24 02:38:42,690 INFO L226 Difference]: Without dead ends: 984 [2020-10-24 02:38:42,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:38:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2020-10-24 02:38:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 970. [2020-10-24 02:38:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-10-24 02:38:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 971 transitions. [2020-10-24 02:38:42,865 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 971 transitions. Word has length 952 [2020-10-24 02:38:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:38:42,866 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 971 transitions. [2020-10-24 02:38:42,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:38:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 971 transitions. [2020-10-24 02:38:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2020-10-24 02:38:42,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:38:42,873 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:38:42,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:38:42,873 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:38:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:38:42,874 INFO L82 PathProgramCache]: Analyzing trace with hash 817021278, now seen corresponding path program 38 times [2020-10-24 02:38:42,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:38:42,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987322676] [2020-10-24 02:38:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:38:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:38:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:38:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12331 backedges. 190 proven. 12141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:38:47,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987322676] [2020-10-24 02:38:47,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:38:47,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 02:38:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241715837] [2020-10-24 02:38:47,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 02:38:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:38:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 02:38:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:38:47,458 INFO L87 Difference]: Start difference. First operand 970 states and 971 transitions. Second operand 43 states. [2020-10-24 02:38:47,770 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:39:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:09,805 INFO L93 Difference]: Finished difference Result 1027 states and 1030 transitions. [2020-10-24 02:39:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-24 02:39:09,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 969 [2020-10-24 02:39:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:09,811 INFO L225 Difference]: With dead ends: 1027 [2020-10-24 02:39:09,811 INFO L226 Difference]: Without dead ends: 1001 [2020-10-24 02:39:09,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 02:39:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-10-24 02:39:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 987. [2020-10-24 02:39:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-10-24 02:39:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 988 transitions. [2020-10-24 02:39:09,995 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 988 transitions. Word has length 969 [2020-10-24 02:39:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:09,995 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 988 transitions. [2020-10-24 02:39:09,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 02:39:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 988 transitions. [2020-10-24 02:39:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2020-10-24 02:39:10,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:10,002 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:10,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:39:10,003 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -388076606, now seen corresponding path program 39 times [2020-10-24 02:39:10,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:10,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589021261] [2020-10-24 02:39:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:13,814 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:39:13,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 195 proven. 12792 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:14,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589021261] [2020-10-24 02:39:14,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:14,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:39:14,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897541379] [2020-10-24 02:39:14,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:39:14,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:14,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:39:14,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:39:14,929 INFO L87 Difference]: Start difference. First operand 987 states and 988 transitions. Second operand 44 states. [2020-10-24 02:39:15,262 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:39:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:39,279 INFO L93 Difference]: Finished difference Result 1044 states and 1047 transitions. [2020-10-24 02:39:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 02:39:39,281 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 986 [2020-10-24 02:39:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:39,285 INFO L225 Difference]: With dead ends: 1044 [2020-10-24 02:39:39,285 INFO L226 Difference]: Without dead ends: 1018 [2020-10-24 02:39:39,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:39:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2020-10-24 02:39:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1004. [2020-10-24 02:39:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-10-24 02:39:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1005 transitions. [2020-10-24 02:39:39,480 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1005 transitions. Word has length 986 [2020-10-24 02:39:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:39,480 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1005 transitions. [2020-10-24 02:39:39,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:39:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1005 transitions. [2020-10-24 02:39:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2020-10-24 02:39:39,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:39,487 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:39:39,488 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash -717728290, now seen corresponding path program 40 times [2020-10-24 02:39:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120490594] [2020-10-24 02:39:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:43,592 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-24 02:39:43,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13660 backedges. 200 proven. 13460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:44,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120490594] [2020-10-24 02:39:44,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:44,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 02:39:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157572745] [2020-10-24 02:39:44,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 02:39:44,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 02:39:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:39:44,724 INFO L87 Difference]: Start difference. First operand 1004 states and 1005 transitions. Second operand 45 states. [2020-10-24 02:39:45,070 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:40:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:10,668 INFO L93 Difference]: Finished difference Result 1061 states and 1064 transitions. [2020-10-24 02:40:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:40:10,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 1003 [2020-10-24 02:40:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:10,675 INFO L225 Difference]: With dead ends: 1061 [2020-10-24 02:40:10,676 INFO L226 Difference]: Without dead ends: 1035 [2020-10-24 02:40:10,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:40:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-24 02:40:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1021. [2020-10-24 02:40:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1021 states. [2020-10-24 02:40:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1022 transitions. [2020-10-24 02:40:10,895 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1022 transitions. Word has length 1003 [2020-10-24 02:40:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:10,896 INFO L481 AbstractCegarLoop]: Abstraction has 1021 states and 1022 transitions. [2020-10-24 02:40:10,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 02:40:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1022 transitions. [2020-10-24 02:40:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2020-10-24 02:40:10,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:10,904 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:10,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:40:10,904 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash -559651006, now seen corresponding path program 41 times [2020-10-24 02:40:10,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:10,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188261759] [2020-10-24 02:40:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:14,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14350 backedges. 205 proven. 14145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188261759] [2020-10-24 02:40:16,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:16,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:40:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122448013] [2020-10-24 02:40:16,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:40:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:40:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:40:16,173 INFO L87 Difference]: Start difference. First operand 1021 states and 1022 transitions. Second operand 46 states. [2020-10-24 02:40:16,509 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-24 02:40:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:43,453 INFO L93 Difference]: Finished difference Result 1078 states and 1081 transitions. [2020-10-24 02:40:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-24 02:40:43,455 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 1020 [2020-10-24 02:40:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:43,460 INFO L225 Difference]: With dead ends: 1078 [2020-10-24 02:40:43,460 INFO L226 Difference]: Without dead ends: 1052 [2020-10-24 02:40:43,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 02:40:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-10-24 02:40:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1038. [2020-10-24 02:40:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-10-24 02:40:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1039 transitions. [2020-10-24 02:40:43,690 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1039 transitions. Word has length 1020 [2020-10-24 02:40:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:43,691 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1039 transitions. [2020-10-24 02:40:43,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:40:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1039 transitions. [2020-10-24 02:40:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2020-10-24 02:40:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:43,703 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:43,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:40:43,703 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:43,704 INFO L82 PathProgramCache]: Analyzing trace with hash -742864290, now seen corresponding path program 42 times [2020-10-24 02:40:43,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:43,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119425752] [2020-10-24 02:40:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:50,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:40:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:40:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15057 backedges. 543 proven. 14514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:40:53,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119425752] [2020-10-24 02:40:53,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:40:53,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:40:53,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425286900] [2020-10-24 02:40:53,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:40:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:40:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:40:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:40:53,142 INFO L87 Difference]: Start difference. First operand 1038 states and 1039 transitions. Second operand 50 states. [2020-10-24 02:41:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:41:25,274 INFO L93 Difference]: Finished difference Result 1047 states and 1048 transitions. [2020-10-24 02:41:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-24 02:41:25,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 1037 [2020-10-24 02:41:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:41:25,276 INFO L225 Difference]: With dead ends: 1047 [2020-10-24 02:41:25,276 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:41:25,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=166, Invalid=2590, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:41:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:41:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:41:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:41:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:41:25,279 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1037 [2020-10-24 02:41:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:41:25,279 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:41:25,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:41:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:41:25,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:41:25,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:41:25,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:41:25,813 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-24 02:41:32,209 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 318 DAG size of output: 315 [2020-10-24 02:41:32,366 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-24 02:41:32,817 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-24 02:41:37,842 WARN L193 SmtUtils]: Spent 4.92 s on a formula simplification. DAG size of input: 322 DAG size of output: 318 [2020-10-24 02:41:39,388 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 321 DAG size of output: 230 [2020-10-24 02:41:39,536 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-24 02:41:39,676 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-24 02:41:39,786 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-24 02:41:40,951 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 319 DAG size of output: 230 [2020-10-24 02:41:46,692 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2020-10-24 02:41:47,592 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:48,103 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:48,651 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:49,177 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:49,436 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-10-24 02:41:49,978 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:50,497 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:50,739 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 4 [2020-10-24 02:41:51,257 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:51,768 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:52,308 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:52,847 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:53,105 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 3 [2020-10-24 02:41:53,650 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:54,169 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:54,681 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:55,192 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:55,723 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:56,458 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:41:57,175 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:41:57,688 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:58,206 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:41:58,718 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:07,547 WARN L193 SmtUtils]: Spent 8.82 s on a formula simplification. DAG size of input: 318 DAG size of output: 228 [2020-10-24 02:42:29,041 WARN L193 SmtUtils]: Spent 21.49 s on a formula simplification. DAG size of input: 404 DAG size of output: 236 [2020-10-24 02:42:29,539 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:30,055 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:38,202 WARN L193 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 309 DAG size of output: 223 [2020-10-24 02:42:38,694 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:39,184 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:39,672 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:40,164 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:40,659 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:41,153 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:41,653 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:42,144 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:42,637 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:43,132 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:43,622 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:44,118 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:44,610 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:45,100 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:45,591 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:46,089 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:46,582 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:47,081 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:47,572 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:48,068 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:48,562 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:49,055 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:49,549 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:50,050 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:50,543 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:51,044 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:51,740 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:42:52,243 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:52,740 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:53,435 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:42:53,932 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:42:54,427 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:02,810 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 317 DAG size of output: 231 [2020-10-24 02:43:03,308 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:03,813 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:04,314 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:05,019 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:43:05,518 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:06,021 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:06,524 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:07,039 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:07,539 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:08,039 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:08,538 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:09,044 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:09,549 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:10,049 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:10,548 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7 [2020-10-24 02:43:11,243 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:43:11,944 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 14 [2020-10-24 02:43:12,442 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 7