/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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 0.1.25-86f66a4 [2020-07-07 14:02:08,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:02:08,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:02:08,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:02:08,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:02:08,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:02:08,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:02:08,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:02:08,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:02:08,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:02:08,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:02:08,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:02:08,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:02:08,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:02:08,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:02:08,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:02:08,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:02:08,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:02:08,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:02:09,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:02:09,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:02:09,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:02:09,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:02:09,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:02:09,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:02:09,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:02:09,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:02:09,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:02:09,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:02:09,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:02:09,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:02:09,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:02:09,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:02:09,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:02:09,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:02:09,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:02:09,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:02:09,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:02:09,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:02:09,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:02:09,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:02:09,031 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:02:09,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:02:09,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:02:09,031 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:02:09,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:02:09,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:02:09,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:02:09,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:02:09,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:02:09,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:02:09,033 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:02:09,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:02:09,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:02:09,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:02:09,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:02:09,357 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:02:09,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-07 14:02:09,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c4941f5/5ea5b0d02f46495e93bbe2350e81f064/FLAG040a019b7 [2020-07-07 14:02:09,993 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:02:09,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-07-07 14:02:10,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c4941f5/5ea5b0d02f46495e93bbe2350e81f064/FLAG040a019b7 [2020-07-07 14:02:10,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c4941f5/5ea5b0d02f46495e93bbe2350e81f064 [2020-07-07 14:02:10,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:02:10,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:02:10,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:10,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:02:10,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:02:10,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13974a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10, skipping insertion in model container [2020-07-07 14:02:10,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:02:10,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:02:10,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:10,789 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:02:10,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:02:10,904 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:02:10,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10 WrapperNode [2020-07-07 14:02:10,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:02:10,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:02:10,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:02:10,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:02:10,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (1/1) ... [2020-07-07 14:02:10,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:02:10,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:02:10,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:02:10,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:02:10,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (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 [2020-07-07 14:02:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:02:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:02:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:02:11,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 14:02:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 14:02:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 14:02:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-07 14:02:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 14:02:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:02:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:02:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 14:02:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 14:02:12,072 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:02:12,073 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 14:02:12,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:12 BoogieIcfgContainer [2020-07-07 14:02:12,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:02:12,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:02:12,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:02:12,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:02:12,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:02:10" (1/3) ... [2020-07-07 14:02:12,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d699ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:12, skipping insertion in model container [2020-07-07 14:02:12,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:02:10" (2/3) ... [2020-07-07 14:02:12,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d699ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:02:12, skipping insertion in model container [2020-07-07 14:02:12,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:02:12" (3/3) ... [2020-07-07 14:02:12,101 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-07-07 14:02:12,113 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:02:12,123 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:02:12,139 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:02:12,164 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:02:12,165 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:02:12,165 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:02:12,165 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:02:12,166 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:02:12,166 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:02:12,166 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:02:12,166 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:02:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states. [2020-07-07 14:02:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-07-07 14:02:12,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:12,219 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] [2020-07-07 14:02:12,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1533680843, now seen corresponding path program 1 times [2020-07-07 14:02:12,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:12,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174012316] [2020-07-07 14:02:12,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:13,051 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:13,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174012316] [2020-07-07 14:02:13,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:13,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:02:13,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006897136] [2020-07-07 14:02:13,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:02:13,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:02:13,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:02:13,085 INFO L87 Difference]: Start difference. First operand 348 states. Second operand 6 states. [2020-07-07 14:02:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:13,984 INFO L93 Difference]: Finished difference Result 386 states and 393 transitions. [2020-07-07 14:02:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:02:13,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-07-07 14:02:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:14,019 INFO L225 Difference]: With dead ends: 386 [2020-07-07 14:02:14,019 INFO L226 Difference]: Without dead ends: 349 [2020-07-07 14:02:14,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-07 14:02:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 330. [2020-07-07 14:02:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-07-07 14:02:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 331 transitions. [2020-07-07 14:02:14,112 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 331 transitions. Word has length 317 [2020-07-07 14:02:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:14,116 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 331 transitions. [2020-07-07 14:02:14,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:02:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 331 transitions. [2020-07-07 14:02:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-07-07 14:02:14,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:14,123 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] [2020-07-07 14:02:14,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:02:14,124 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash 770044171, now seen corresponding path program 1 times [2020-07-07 14:02:14,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:14,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105261350] [2020-07-07 14:02:14,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:14,557 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:14,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105261350] [2020-07-07 14:02:14,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:14,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:02:14,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759846344] [2020-07-07 14:02:14,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:02:14,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:02:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:02:14,569 INFO L87 Difference]: Start difference. First operand 330 states and 331 transitions. Second operand 5 states. [2020-07-07 14:02:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:15,557 INFO L93 Difference]: Finished difference Result 374 states and 377 transitions. [2020-07-07 14:02:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:02:15,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-07-07 14:02:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:15,566 INFO L225 Difference]: With dead ends: 374 [2020-07-07 14:02:15,566 INFO L226 Difference]: Without dead ends: 349 [2020-07-07 14:02:15,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:02:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-07 14:02:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-07-07 14:02:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-07-07 14:02:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2020-07-07 14:02:15,632 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 317 [2020-07-07 14:02:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:15,633 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2020-07-07 14:02:15,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:02:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2020-07-07 14:02:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-07 14:02:15,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:15,643 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] [2020-07-07 14:02:15,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:02:15,644 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -913925315, now seen corresponding path program 1 times [2020-07-07 14:02:15,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:15,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570673910] [2020-07-07 14:02:15,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:16,087 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:16,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570673910] [2020-07-07 14:02:16,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:16,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:02:16,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363766053] [2020-07-07 14:02:16,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:02:16,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:02:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:02:16,092 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 6 states. [2020-07-07 14:02:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:17,010 INFO L93 Difference]: Finished difference Result 391 states and 394 transitions. [2020-07-07 14:02:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:02:17,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-07-07 14:02:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:17,016 INFO L225 Difference]: With dead ends: 391 [2020-07-07 14:02:17,016 INFO L226 Difference]: Without dead ends: 366 [2020-07-07 14:02:17,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:02:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-07 14:02:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-07-07 14:02:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-07 14:02:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-07-07 14:02:17,070 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 334 [2020-07-07 14:02:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:17,071 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-07-07 14:02:17,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:02:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-07-07 14:02:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-07 14:02:17,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:17,079 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] [2020-07-07 14:02:17,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:02:17,079 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash 646798155, now seen corresponding path program 2 times [2020-07-07 14:02:17,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:17,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203794840] [2020-07-07 14:02:17,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:17,572 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:17,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203794840] [2020-07-07 14:02:17,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:02:17,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012730018] [2020-07-07 14:02:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:02:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:02:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:02:17,575 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 7 states. [2020-07-07 14:02:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:18,606 INFO L93 Difference]: Finished difference Result 408 states and 411 transitions. [2020-07-07 14:02:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:02:18,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-07-07 14:02:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:18,609 INFO L225 Difference]: With dead ends: 408 [2020-07-07 14:02:18,609 INFO L226 Difference]: Without dead ends: 383 [2020-07-07 14:02:18,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:02:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-07 14:02:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-07-07 14:02:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-07-07 14:02:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2020-07-07 14:02:18,672 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 351 [2020-07-07 14:02:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:18,673 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2020-07-07 14:02:18,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:02:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2020-07-07 14:02:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-07 14:02:18,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:18,676 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] [2020-07-07 14:02:18,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:02:18,677 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -539428611, now seen corresponding path program 3 times [2020-07-07 14:02:18,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:18,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470209690] [2020-07-07 14:02:18,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:19,090 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:19,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470209690] [2020-07-07 14:02:19,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:19,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:02:19,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328795510] [2020-07-07 14:02:19,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:02:19,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:02:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:02:19,093 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 8 states. [2020-07-07 14:02:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:20,183 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2020-07-07 14:02:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:02:20,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-07-07 14:02:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:20,187 INFO L225 Difference]: With dead ends: 425 [2020-07-07 14:02:20,187 INFO L226 Difference]: Without dead ends: 400 [2020-07-07 14:02:20,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-07-07 14:02:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-07-07 14:02:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-07-07 14:02:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2020-07-07 14:02:20,241 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 368 [2020-07-07 14:02:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:20,242 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2020-07-07 14:02:20,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:02:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2020-07-07 14:02:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-07 14:02:20,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:20,246 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] [2020-07-07 14:02:20,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:02:20,246 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1425394293, now seen corresponding path program 4 times [2020-07-07 14:02:20,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:20,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090381915] [2020-07-07 14:02:20,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:20,713 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090381915] [2020-07-07 14:02:20,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:20,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:02:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230092798] [2020-07-07 14:02:20,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:02:20,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:02:20,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:02:20,716 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 9 states. [2020-07-07 14:02:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:21,902 INFO L93 Difference]: Finished difference Result 442 states and 445 transitions. [2020-07-07 14:02:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:02:21,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-07-07 14:02:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:21,909 INFO L225 Difference]: With dead ends: 442 [2020-07-07 14:02:21,909 INFO L226 Difference]: Without dead ends: 417 [2020-07-07 14:02:21,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:02:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-07-07 14:02:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-07-07 14:02:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-07-07 14:02:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-07-07 14:02:21,976 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 385 [2020-07-07 14:02:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:21,977 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-07-07 14:02:21,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:02:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-07-07 14:02:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-07 14:02:21,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:21,981 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] [2020-07-07 14:02:21,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:02:21,982 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1042028867, now seen corresponding path program 5 times [2020-07-07 14:02:21,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:21,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390784092] [2020-07-07 14:02:21,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:22,454 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:22,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390784092] [2020-07-07 14:02:22,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:22,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:02:22,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974319666] [2020-07-07 14:02:22,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:02:22,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:22,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:02:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:22,457 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 10 states. [2020-07-07 14:02:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:23,781 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2020-07-07 14:02:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:02:23,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-07-07 14:02:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:23,785 INFO L225 Difference]: With dead ends: 459 [2020-07-07 14:02:23,786 INFO L226 Difference]: Without dead ends: 434 [2020-07-07 14:02:23,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:02:23,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-07-07 14:02:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-07-07 14:02:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-07-07 14:02:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2020-07-07 14:02:23,848 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 402 [2020-07-07 14:02:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:23,849 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2020-07-07 14:02:23,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:02:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2020-07-07 14:02:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-07-07 14:02:23,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:23,852 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] [2020-07-07 14:02:23,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:02:23,853 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:23,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1509982155, now seen corresponding path program 6 times [2020-07-07 14:02:23,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:23,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069599484] [2020-07-07 14:02:23,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:24,405 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:24,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069599484] [2020-07-07 14:02:24,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:24,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:02:24,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625371623] [2020-07-07 14:02:24,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:02:24,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:02:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:02:24,409 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 11 states. [2020-07-07 14:02:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:25,890 INFO L93 Difference]: Finished difference Result 476 states and 479 transitions. [2020-07-07 14:02:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:02:25,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-07-07 14:02:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:25,894 INFO L225 Difference]: With dead ends: 476 [2020-07-07 14:02:25,894 INFO L226 Difference]: Without dead ends: 451 [2020-07-07 14:02:25,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-07-07 14:02:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-07-07 14:02:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-07-07 14:02:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2020-07-07 14:02:25,989 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 419 [2020-07-07 14:02:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:25,990 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2020-07-07 14:02:25,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:02:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2020-07-07 14:02:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-07 14:02:25,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:25,994 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] [2020-07-07 14:02:25,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:02:25,995 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1837327485, now seen corresponding path program 7 times [2020-07-07 14:02:25,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:25,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142816578] [2020-07-07 14:02:25,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:26,692 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:26,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142816578] [2020-07-07 14:02:26,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:26,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:02:26,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507005225] [2020-07-07 14:02:26,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:02:26,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:26,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:02:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:02:26,703 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 12 states. [2020-07-07 14:02:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:28,268 INFO L93 Difference]: Finished difference Result 493 states and 496 transitions. [2020-07-07 14:02:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:02:28,269 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-07-07 14:02:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:28,272 INFO L225 Difference]: With dead ends: 493 [2020-07-07 14:02:28,272 INFO L226 Difference]: Without dead ends: 468 [2020-07-07 14:02:28,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:02:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-07-07 14:02:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-07-07 14:02:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-07-07 14:02:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2020-07-07 14:02:28,366 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 436 [2020-07-07 14:02:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:28,367 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2020-07-07 14:02:28,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:02:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2020-07-07 14:02:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-07-07 14:02:28,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:28,371 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] [2020-07-07 14:02:28,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:02:28,372 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash 689191435, now seen corresponding path program 8 times [2020-07-07 14:02:28,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:28,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116446205] [2020-07-07 14:02:28,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:28,999 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:28,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116446205] [2020-07-07 14:02:28,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:28,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:02:29,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070913547] [2020-07-07 14:02:29,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:02:29,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:02:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:29,001 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 13 states. [2020-07-07 14:02:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:30,751 INFO L93 Difference]: Finished difference Result 510 states and 513 transitions. [2020-07-07 14:02:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 14:02:30,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-07-07 14:02:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:30,757 INFO L225 Difference]: With dead ends: 510 [2020-07-07 14:02:30,757 INFO L226 Difference]: Without dead ends: 485 [2020-07-07 14:02:30,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:02:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-07-07 14:02:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-07-07 14:02:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-07-07 14:02:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2020-07-07 14:02:30,888 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 453 [2020-07-07 14:02:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:30,889 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2020-07-07 14:02:30,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:02:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2020-07-07 14:02:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-07 14:02:30,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:30,893 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] [2020-07-07 14:02:30,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:02:30,893 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1771270717, now seen corresponding path program 9 times [2020-07-07 14:02:30,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:30,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046416480] [2020-07-07 14:02:30,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:31,613 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:31,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046416480] [2020-07-07 14:02:31,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:31,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:02:31,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212245059] [2020-07-07 14:02:31,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:02:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:31,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:02:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:02:31,617 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 14 states. [2020-07-07 14:02:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:33,615 INFO L93 Difference]: Finished difference Result 527 states and 530 transitions. [2020-07-07 14:02:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:02:33,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-07-07 14:02:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:33,621 INFO L225 Difference]: With dead ends: 527 [2020-07-07 14:02:33,621 INFO L226 Difference]: Without dead ends: 502 [2020-07-07 14:02:33,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:02:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-07-07 14:02:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-07-07 14:02:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-07-07 14:02:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2020-07-07 14:02:33,775 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 470 [2020-07-07 14:02:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:33,776 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2020-07-07 14:02:33,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:02:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2020-07-07 14:02:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-07 14:02:33,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:33,780 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] [2020-07-07 14:02:33,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:02:33,781 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1528208309, now seen corresponding path program 10 times [2020-07-07 14:02:33,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:33,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760549919] [2020-07-07 14:02:33,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:34,626 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:34,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760549919] [2020-07-07 14:02:34,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:34,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:02:34,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377421714] [2020-07-07 14:02:34,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:02:34,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:02:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:02:34,628 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 15 states. [2020-07-07 14:02:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:36,845 INFO L93 Difference]: Finished difference Result 544 states and 547 transitions. [2020-07-07 14:02:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 14:02:36,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-07-07 14:02:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:36,849 INFO L225 Difference]: With dead ends: 544 [2020-07-07 14:02:36,849 INFO L226 Difference]: Without dead ends: 519 [2020-07-07 14:02:36,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:02:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-07-07 14:02:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-07-07 14:02:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-07-07 14:02:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2020-07-07 14:02:37,269 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 487 [2020-07-07 14:02:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:37,270 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2020-07-07 14:02:37,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:02:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2020-07-07 14:02:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-07 14:02:37,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:37,274 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] [2020-07-07 14:02:37,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:02:37,274 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:37,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2047864835, now seen corresponding path program 11 times [2020-07-07 14:02:37,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:37,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305184855] [2020-07-07 14:02:37,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:37,977 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:37,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305184855] [2020-07-07 14:02:37,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:37,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 14:02:37,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271824490] [2020-07-07 14:02:37,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 14:02:37,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 14:02:37,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:02:37,980 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 16 states. [2020-07-07 14:02:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:40,629 INFO L93 Difference]: Finished difference Result 561 states and 564 transitions. [2020-07-07 14:02:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 14:02:40,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-07-07 14:02:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:40,633 INFO L225 Difference]: With dead ends: 561 [2020-07-07 14:02:40,633 INFO L226 Difference]: Without dead ends: 536 [2020-07-07 14:02:40,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:02:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-07-07 14:02:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-07-07 14:02:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-07-07 14:02:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2020-07-07 14:02:41,201 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 504 [2020-07-07 14:02:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:41,201 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2020-07-07 14:02:41,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 14:02:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2020-07-07 14:02:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-07-07 14:02:41,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:41,205 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] [2020-07-07 14:02:41,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:02:41,205 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 824442507, now seen corresponding path program 12 times [2020-07-07 14:02:41,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:41,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356207031] [2020-07-07 14:02:41,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:43,252 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:43,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356207031] [2020-07-07 14:02:43,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:43,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 14:02:43,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131740006] [2020-07-07 14:02:43,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 14:02:43,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:43,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 14:02:43,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:02:43,254 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 17 states. [2020-07-07 14:02:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:46,344 INFO L93 Difference]: Finished difference Result 578 states and 581 transitions. [2020-07-07 14:02:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:02:46,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-07-07 14:02:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:46,348 INFO L225 Difference]: With dead ends: 578 [2020-07-07 14:02:46,349 INFO L226 Difference]: Without dead ends: 553 [2020-07-07 14:02:46,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:02:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-07-07 14:02:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-07-07 14:02:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-07-07 14:02:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2020-07-07 14:02:47,239 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 521 [2020-07-07 14:02:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:47,240 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2020-07-07 14:02:47,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 14:02:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2020-07-07 14:02:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-07-07 14:02:47,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:47,244 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] [2020-07-07 14:02:47,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:02:47,244 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1686815299, now seen corresponding path program 13 times [2020-07-07 14:02:47,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:47,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350429492] [2020-07-07 14:02:47,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:48,613 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:48,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350429492] [2020-07-07 14:02:48,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:48,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 14:02:48,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071366649] [2020-07-07 14:02:48,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 14:02:48,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 14:02:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:02:48,615 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand 18 states. [2020-07-07 14:02:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:52,820 INFO L93 Difference]: Finished difference Result 595 states and 598 transitions. [2020-07-07 14:02:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:02:52,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 538 [2020-07-07 14:02:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:52,825 INFO L225 Difference]: With dead ends: 595 [2020-07-07 14:02:52,825 INFO L226 Difference]: Without dead ends: 570 [2020-07-07 14:02:52,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:02:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-07-07 14:02:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 556. [2020-07-07 14:02:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-07-07 14:02:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 557 transitions. [2020-07-07 14:02:57,237 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 557 transitions. Word has length 538 [2020-07-07 14:02:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:57,238 INFO L479 AbstractCegarLoop]: Abstraction has 556 states and 557 transitions. [2020-07-07 14:02:57,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 14:02:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 557 transitions. [2020-07-07 14:02:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2020-07-07 14:02:57,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:57,243 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] [2020-07-07 14:02:57,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 14:02:57,244 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:57,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1214777547, now seen corresponding path program 14 times [2020-07-07 14:02:57,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:57,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009140820] [2020-07-07 14:02:57,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:58,614 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:58,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009140820] [2020-07-07 14:02:58,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:58,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 14:02:58,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257081688] [2020-07-07 14:02:58,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 14:02:58,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 14:02:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:58,616 INFO L87 Difference]: Start difference. First operand 556 states and 557 transitions. Second operand 19 states. [2020-07-07 14:03:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:04,851 INFO L93 Difference]: Finished difference Result 612 states and 615 transitions. [2020-07-07 14:03:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 14:03:04,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 555 [2020-07-07 14:03:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:04,856 INFO L225 Difference]: With dead ends: 612 [2020-07-07 14:03:04,856 INFO L226 Difference]: Without dead ends: 587 [2020-07-07 14:03:04,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:03:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-07-07 14:03:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 573. [2020-07-07 14:03:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-07-07 14:03:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 574 transitions. [2020-07-07 14:03:12,394 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 574 transitions. Word has length 555 [2020-07-07 14:03:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:12,395 INFO L479 AbstractCegarLoop]: Abstraction has 573 states and 574 transitions. [2020-07-07 14:03:12,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 14:03:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 574 transitions. [2020-07-07 14:03:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-07 14:03:12,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:12,398 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] [2020-07-07 14:03:12,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 14:03:12,399 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1275001725, now seen corresponding path program 15 times [2020-07-07 14:03:12,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:12,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870044342] [2020-07-07 14:03:12,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:13,942 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:13,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870044342] [2020-07-07 14:03:13,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:13,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 14:03:13,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334777960] [2020-07-07 14:03:13,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 14:03:13,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 14:03:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-07-07 14:03:13,944 INFO L87 Difference]: Start difference. First operand 573 states and 574 transitions. Second operand 20 states. [2020-07-07 14:03:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:30,156 INFO L93 Difference]: Finished difference Result 629 states and 632 transitions. [2020-07-07 14:03:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:03:30,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 572 [2020-07-07 14:03:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:30,162 INFO L225 Difference]: With dead ends: 629 [2020-07-07 14:03:30,162 INFO L226 Difference]: Without dead ends: 604 [2020-07-07 14:03:30,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:03:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-07-07 14:03:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2020-07-07 14:03:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-07 14:03:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 591 transitions. [2020-07-07 14:03:44,480 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 591 transitions. Word has length 572 [2020-07-07 14:03:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:44,481 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 591 transitions. [2020-07-07 14:03:44,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 14:03:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 591 transitions. [2020-07-07 14:03:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2020-07-07 14:03:44,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:44,484 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] [2020-07-07 14:03:44,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 14:03:44,484 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1134984437, now seen corresponding path program 16 times [2020-07-07 14:03:44,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:44,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131072598] [2020-07-07 14:03:44,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:45,484 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:45,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131072598] [2020-07-07 14:03:45,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:45,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 14:03:45,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871674830] [2020-07-07 14:03:45,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 14:03:45,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:45,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 14:03:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:03:45,486 INFO L87 Difference]: Start difference. First operand 590 states and 591 transitions. Second operand 21 states. [2020-07-07 14:04:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:13,378 INFO L93 Difference]: Finished difference Result 646 states and 649 transitions. [2020-07-07 14:04:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 14:04:13,379 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 589 [2020-07-07 14:04:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:13,383 INFO L225 Difference]: With dead ends: 646 [2020-07-07 14:04:13,383 INFO L226 Difference]: Without dead ends: 621 [2020-07-07 14:04:13,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:04:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-07-07 14:04:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 607. [2020-07-07 14:04:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-07-07 14:04:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 608 transitions. [2020-07-07 14:04:41,494 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 608 transitions. Word has length 589 [2020-07-07 14:04:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:41,494 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 608 transitions. [2020-07-07 14:04:41,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 14:04:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 608 transitions. [2020-07-07 14:04:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2020-07-07 14:04:41,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:41,498 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] [2020-07-07 14:04:41,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 14:04:41,498 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1033287363, now seen corresponding path program 17 times [2020-07-07 14:04:41,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:41,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822536047] [2020-07-07 14:04:41,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:44,003 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:44,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822536047] [2020-07-07 14:04:44,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:44,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-07 14:04:44,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126156443] [2020-07-07 14:04:44,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 14:04:44,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 14:04:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-07-07 14:04:44,005 INFO L87 Difference]: Start difference. First operand 607 states and 608 transitions. Second operand 22 states. [2020-07-07 14:05:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:52,777 INFO L93 Difference]: Finished difference Result 663 states and 666 transitions. [2020-07-07 14:05:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:05:52,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 606 [2020-07-07 14:05:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:52,785 INFO L225 Difference]: With dead ends: 663 [2020-07-07 14:05:52,785 INFO L226 Difference]: Without dead ends: 638 [2020-07-07 14:05:52,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:05:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-07-07 14:07:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 624. [2020-07-07 14:07:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-07-07 14:07:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 625 transitions. [2020-07-07 14:07:05,462 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 625 transitions. Word has length 606 [2020-07-07 14:07:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:05,463 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 625 transitions. [2020-07-07 14:07:05,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 14:07:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 625 transitions. [2020-07-07 14:07:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2020-07-07 14:07:05,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:05,469 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] [2020-07-07 14:07:05,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 14:07:05,469 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:05,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:05,470 INFO L82 PathProgramCache]: Analyzing trace with hash -174297781, now seen corresponding path program 18 times [2020-07-07 14:07:05,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:05,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507380821] [2020-07-07 14:07:05,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:07,102 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:07,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507380821] [2020-07-07 14:07:07,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:07,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 14:07:07,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659546340] [2020-07-07 14:07:07,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 14:07:07,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:07,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 14:07:07,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:07:07,108 INFO L87 Difference]: Start difference. First operand 624 states and 625 transitions. Second operand 23 states. [2020-07-07 14:07:09,071 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 45 [2020-07-07 14:10:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:00,088 INFO L93 Difference]: Finished difference Result 680 states and 683 transitions. [2020-07-07 14:10:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 14:10:00,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 623 [2020-07-07 14:10:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:00,094 INFO L225 Difference]: With dead ends: 680 [2020-07-07 14:10:00,094 INFO L226 Difference]: Without dead ends: 655 [2020-07-07 14:10:00,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:10:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states.