/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:24:47,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:24:47,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:24:47,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:24:47,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:24:47,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:24:47,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:24:47,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:24:47,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:24:47,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:24:47,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:24:47,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:24:47,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:24:47,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:24:47,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:24:47,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:24:47,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:24:47,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:24:47,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:24:47,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:24:47,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:24:47,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:24:47,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:24:47,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:24:47,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:24:47,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:24:47,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:24:47,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:24:47,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:24:47,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:24:47,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:24:47,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:24:47,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:24:47,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:24:47,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:24:47,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:24:47,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:24:47,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:24:47,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:24:47,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:24:47,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:24:47,996 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:24:47,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:24:47,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:24:47,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:24:47,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:24:47,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:24:47,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:24:47,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:24:47,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:24:48,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:24:48,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:24:48,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:24:48,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:24:48,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:24:48,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:24:48,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:24:48,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:24:48,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:24:48,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:24:48,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:24:48,415 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:24:48,416 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:24:48,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:24:48,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a02895b/8dbf2ec8dca34a368abb2201843f9023/FLAGad42045e8 [2020-12-22 08:24:49,165 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:24:49,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:24:49,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a02895b/8dbf2ec8dca34a368abb2201843f9023/FLAGad42045e8 [2020-12-22 08:24:49,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a02895b/8dbf2ec8dca34a368abb2201843f9023 [2020-12-22 08:24:49,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:24:49,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:24:49,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:49,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:24:49,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:24:49,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:49,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a005b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49, skipping insertion in model container [2020-12-22 08:24:49,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:49,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:24:49,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:24:49,778 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4933,4946] [2020-12-22 08:24:49,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:49,833 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:24:49,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4933,4946] [2020-12-22 08:24:49,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:24:49,971 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:24:49,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49 WrapperNode [2020-12-22 08:24:49,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:24:49,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:49,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:24:49,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:24:49,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:49,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:24:50,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:24:50,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:24:50,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:24:50,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (1/1) ... [2020-12-22 08:24:50,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:24:50,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:24:50,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:24:50,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:24:50,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (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 [2020-12-22 08:24:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:24:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:24:50,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:24:50,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:24:51,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:24:51,123 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:24:51,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:51 BoogieIcfgContainer [2020-12-22 08:24:51,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:24:51,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:24:51,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:24:51,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:24:51,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:24:49" (1/3) ... [2020-12-22 08:24:51,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a31842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:51, skipping insertion in model container [2020-12-22 08:24:51,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:24:49" (2/3) ... [2020-12-22 08:24:51,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a31842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:24:51, skipping insertion in model container [2020-12-22 08:24:51,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:24:51" (3/3) ... [2020-12-22 08:24:51,138 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-12-22 08:24:51,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:24:51,150 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:24:51,174 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:24:51,203 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:24:51,203 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:24:51,203 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:24:51,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:24:51,204 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:24:51,204 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:24:51,204 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:24:51,204 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:24:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-12-22 08:24:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:24:51,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:51,231 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] [2020-12-22 08:24:51,231 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1289871298, now seen corresponding path program 1 times [2020-12-22 08:24:51,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:51,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057283899] [2020-12-22 08:24:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:51,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057283899] [2020-12-22 08:24:51,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:51,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:51,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770589762] [2020-12-22 08:24:51,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:51,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:51,692 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 3 states. [2020-12-22 08:24:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:51,771 INFO L93 Difference]: Finished difference Result 260 states and 419 transitions. [2020-12-22 08:24:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:51,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:24:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:51,787 INFO L225 Difference]: With dead ends: 260 [2020-12-22 08:24:51,788 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 08:24:51,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 08:24:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-12-22 08:24:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 08:24:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 253 transitions. [2020-12-22 08:24:51,860 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 253 transitions. Word has length 48 [2020-12-22 08:24:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:51,861 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 253 transitions. [2020-12-22 08:24:51,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 253 transitions. [2020-12-22 08:24:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:24:51,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:51,864 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] [2020-12-22 08:24:51,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:24:51,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1971653998, now seen corresponding path program 1 times [2020-12-22 08:24:51,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:51,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016451818] [2020-12-22 08:24:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:52,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016451818] [2020-12-22 08:24:52,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:52,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:52,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110321675] [2020-12-22 08:24:52,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,026 INFO L87 Difference]: Start difference. First operand 169 states and 253 transitions. Second operand 3 states. [2020-12-22 08:24:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:52,107 INFO L93 Difference]: Finished difference Result 421 states and 653 transitions. [2020-12-22 08:24:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:52,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:24:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:52,111 INFO L225 Difference]: With dead ends: 421 [2020-12-22 08:24:52,111 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 08:24:52,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 08:24:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2020-12-22 08:24:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 08:24:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 424 transitions. [2020-12-22 08:24:52,153 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 424 transitions. Word has length 49 [2020-12-22 08:24:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:52,154 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 424 transitions. [2020-12-22 08:24:52,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 424 transitions. [2020-12-22 08:24:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:24:52,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:52,156 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] [2020-12-22 08:24:52,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:24:52,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:52,158 INFO L82 PathProgramCache]: Analyzing trace with hash 663495285, now seen corresponding path program 1 times [2020-12-22 08:24:52,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:52,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909672948] [2020-12-22 08:24:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:52,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909672948] [2020-12-22 08:24:52,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:52,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143356503] [2020-12-22 08:24:52,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:52,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,314 INFO L87 Difference]: Start difference. First operand 277 states and 424 transitions. Second operand 3 states. [2020-12-22 08:24:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:52,423 INFO L93 Difference]: Finished difference Result 713 states and 1114 transitions. [2020-12-22 08:24:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:52,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:24:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:52,429 INFO L225 Difference]: With dead ends: 713 [2020-12-22 08:24:52,429 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 08:24:52,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 08:24:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2020-12-22 08:24:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-22 08:24:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 712 transitions. [2020-12-22 08:24:52,487 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 712 transitions. Word has length 50 [2020-12-22 08:24:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:52,487 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 712 transitions. [2020-12-22 08:24:52,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 712 transitions. [2020-12-22 08:24:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:24:52,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:52,490 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] [2020-12-22 08:24:52,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:24:52,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1706895887, now seen corresponding path program 1 times [2020-12-22 08:24:52,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:52,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760814076] [2020-12-22 08:24:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760814076] [2020-12-22 08:24:52,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:52,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609489484] [2020-12-22 08:24:52,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:52,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,601 INFO L87 Difference]: Start difference. First operand 461 states and 712 transitions. Second operand 3 states. [2020-12-22 08:24:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:52,669 INFO L93 Difference]: Finished difference Result 1201 states and 1874 transitions. [2020-12-22 08:24:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:52,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:24:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:52,675 INFO L225 Difference]: With dead ends: 1201 [2020-12-22 08:24:52,676 INFO L226 Difference]: Without dead ends: 767 [2020-12-22 08:24:52,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-12-22 08:24:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 765. [2020-12-22 08:24:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-12-22 08:24:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1180 transitions. [2020-12-22 08:24:52,763 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1180 transitions. Word has length 51 [2020-12-22 08:24:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:52,763 INFO L481 AbstractCegarLoop]: Abstraction has 765 states and 1180 transitions. [2020-12-22 08:24:52,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1180 transitions. [2020-12-22 08:24:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:24:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:52,766 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] [2020-12-22 08:24:52,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:24:52,766 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:52,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1133800764, now seen corresponding path program 1 times [2020-12-22 08:24:52,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:52,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333823297] [2020-12-22 08:24:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:52,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333823297] [2020-12-22 08:24:52,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:52,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:52,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723700601] [2020-12-22 08:24:52,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:52,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:52,997 INFO L87 Difference]: Start difference. First operand 765 states and 1180 transitions. Second operand 6 states. [2020-12-22 08:24:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:53,329 INFO L93 Difference]: Finished difference Result 3269 states and 5056 transitions. [2020-12-22 08:24:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:53,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 08:24:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:53,346 INFO L225 Difference]: With dead ends: 3269 [2020-12-22 08:24:53,347 INFO L226 Difference]: Without dead ends: 2531 [2020-12-22 08:24:53,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2020-12-22 08:24:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2525. [2020-12-22 08:24:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2525 states. [2020-12-22 08:24:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2525 states to 2525 states and 3884 transitions. [2020-12-22 08:24:53,565 INFO L78 Accepts]: Start accepts. Automaton has 2525 states and 3884 transitions. Word has length 52 [2020-12-22 08:24:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:53,567 INFO L481 AbstractCegarLoop]: Abstraction has 2525 states and 3884 transitions. [2020-12-22 08:24:53,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2525 states and 3884 transitions. [2020-12-22 08:24:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:24:53,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:53,579 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] [2020-12-22 08:24:53,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:24:53,579 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2135389787, now seen corresponding path program 1 times [2020-12-22 08:24:53,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:53,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137271629] [2020-12-22 08:24:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137271629] [2020-12-22 08:24:53,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:53,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:24:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339196583] [2020-12-22 08:24:53,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:53,688 INFO L87 Difference]: Start difference. First operand 2525 states and 3884 transitions. Second operand 5 states. [2020-12-22 08:24:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:54,295 INFO L93 Difference]: Finished difference Result 6969 states and 10750 transitions. [2020-12-22 08:24:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:24:54,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:24:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:54,321 INFO L225 Difference]: With dead ends: 6969 [2020-12-22 08:24:54,321 INFO L226 Difference]: Without dead ends: 4471 [2020-12-22 08:24:54,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:24:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2020-12-22 08:24:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 4469. [2020-12-22 08:24:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4469 states. [2020-12-22 08:24:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6836 transitions. [2020-12-22 08:24:54,713 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6836 transitions. Word has length 54 [2020-12-22 08:24:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:54,713 INFO L481 AbstractCegarLoop]: Abstraction has 4469 states and 6836 transitions. [2020-12-22 08:24:54,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:24:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6836 transitions. [2020-12-22 08:24:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:24:54,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:54,715 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] [2020-12-22 08:24:54,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:24:54,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1662484042, now seen corresponding path program 1 times [2020-12-22 08:24:54,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:54,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382277933] [2020-12-22 08:24:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:54,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382277933] [2020-12-22 08:24:54,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:54,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:54,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948804292] [2020-12-22 08:24:54,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:54,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:54,921 INFO L87 Difference]: Start difference. First operand 4469 states and 6836 transitions. Second operand 6 states. [2020-12-22 08:24:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:56,259 INFO L93 Difference]: Finished difference Result 21327 states and 32681 transitions. [2020-12-22 08:24:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:56,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 08:24:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:56,371 INFO L225 Difference]: With dead ends: 21327 [2020-12-22 08:24:56,371 INFO L226 Difference]: Without dead ends: 16885 [2020-12-22 08:24:56,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:24:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16885 states. [2020-12-22 08:24:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16885 to 8909. [2020-12-22 08:24:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8909 states. [2020-12-22 08:24:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 13420 transitions. [2020-12-22 08:24:57,413 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 13420 transitions. Word has length 54 [2020-12-22 08:24:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:57,415 INFO L481 AbstractCegarLoop]: Abstraction has 8909 states and 13420 transitions. [2020-12-22 08:24:57,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:24:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 13420 transitions. [2020-12-22 08:24:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:24:57,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:57,417 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] [2020-12-22 08:24:57,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:24:57,417 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -22058530, now seen corresponding path program 1 times [2020-12-22 08:24:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:57,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22544548] [2020-12-22 08:24:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22544548] [2020-12-22 08:24:57,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:57,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:24:57,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878832375] [2020-12-22 08:24:57,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:24:57,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:57,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:24:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:24:57,545 INFO L87 Difference]: Start difference. First operand 8909 states and 13420 transitions. Second operand 5 states. [2020-12-22 08:24:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:59,073 INFO L93 Difference]: Finished difference Result 18239 states and 27261 transitions. [2020-12-22 08:24:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:24:59,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 08:24:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:59,115 INFO L225 Difference]: With dead ends: 18239 [2020-12-22 08:24:59,115 INFO L226 Difference]: Without dead ends: 18237 [2020-12-22 08:24:59,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18237 states. [2020-12-22 08:25:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18237 to 9357. [2020-12-22 08:25:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9357 states. [2020-12-22 08:25:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9357 states to 9357 states and 13868 transitions. [2020-12-22 08:25:00,135 INFO L78 Accepts]: Start accepts. Automaton has 9357 states and 13868 transitions. Word has length 55 [2020-12-22 08:25:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:00,135 INFO L481 AbstractCegarLoop]: Abstraction has 9357 states and 13868 transitions. [2020-12-22 08:25:00,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:25:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9357 states and 13868 transitions. [2020-12-22 08:25:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:25:00,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:00,137 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] [2020-12-22 08:25:00,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:25:00,138 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash -673241382, now seen corresponding path program 1 times [2020-12-22 08:25:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:00,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206489048] [2020-12-22 08:25:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:00,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206489048] [2020-12-22 08:25:00,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:00,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:00,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620284780] [2020-12-22 08:25:00,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:00,196 INFO L87 Difference]: Start difference. First operand 9357 states and 13868 transitions. Second operand 3 states. [2020-12-22 08:25:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:00,952 INFO L93 Difference]: Finished difference Result 21051 states and 31132 transitions. [2020-12-22 08:25:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:00,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:25:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:01,061 INFO L225 Difference]: With dead ends: 21051 [2020-12-22 08:25:01,062 INFO L226 Difference]: Without dead ends: 11721 [2020-12-22 08:25:01,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11721 states. [2020-12-22 08:25:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11721 to 11719. [2020-12-22 08:25:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11719 states. [2020-12-22 08:25:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 17234 transitions. [2020-12-22 08:25:01,900 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 17234 transitions. Word has length 56 [2020-12-22 08:25:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:01,900 INFO L481 AbstractCegarLoop]: Abstraction has 11719 states and 17234 transitions. [2020-12-22 08:25:01,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 17234 transitions. [2020-12-22 08:25:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:25:01,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:01,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:01,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:25:01,907 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1821600213, now seen corresponding path program 1 times [2020-12-22 08:25:01,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:01,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858574962] [2020-12-22 08:25:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:25:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858574962] [2020-12-22 08:25:02,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520860073] [2020-12-22 08:25:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:25:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 08:25:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:25:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:25:02,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:25:02,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 08:25:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761707274] [2020-12-22 08:25:02,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:25:02,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:02,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:25:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:02,298 INFO L87 Difference]: Start difference. First operand 11719 states and 17234 transitions. Second operand 7 states. [2020-12-22 08:25:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:04,207 INFO L93 Difference]: Finished difference Result 30739 states and 45293 transitions. [2020-12-22 08:25:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:25:04,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-12-22 08:25:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:04,256 INFO L225 Difference]: With dead ends: 30739 [2020-12-22 08:25:04,256 INFO L226 Difference]: Without dead ends: 21409 [2020-12-22 08:25:04,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:25:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21409 states. [2020-12-22 08:25:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21409 to 20375. [2020-12-22 08:25:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20375 states. [2020-12-22 08:25:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20375 states to 20375 states and 29730 transitions. [2020-12-22 08:25:06,198 INFO L78 Accepts]: Start accepts. Automaton has 20375 states and 29730 transitions. Word has length 77 [2020-12-22 08:25:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:06,198 INFO L481 AbstractCegarLoop]: Abstraction has 20375 states and 29730 transitions. [2020-12-22 08:25:06,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:25:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20375 states and 29730 transitions. [2020-12-22 08:25:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:06,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:06,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:06,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 08:25:06,420 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1365606455, now seen corresponding path program 1 times [2020-12-22 08:25:06,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:06,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617052729] [2020-12-22 08:25:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:06,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617052729] [2020-12-22 08:25:06,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:06,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:06,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559416252] [2020-12-22 08:25:06,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:06,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:06,488 INFO L87 Difference]: Start difference. First operand 20375 states and 29730 transitions. Second operand 3 states. [2020-12-22 08:25:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:08,664 INFO L93 Difference]: Finished difference Result 50584 states and 73628 transitions. [2020-12-22 08:25:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:08,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:25:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:08,734 INFO L225 Difference]: With dead ends: 50584 [2020-12-22 08:25:08,734 INFO L226 Difference]: Without dead ends: 32750 [2020-12-22 08:25:08,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32750 states. [2020-12-22 08:25:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32750 to 31572. [2020-12-22 08:25:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31572 states. [2020-12-22 08:25:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31572 states to 31572 states and 45522 transitions. [2020-12-22 08:25:10,972 INFO L78 Accepts]: Start accepts. Automaton has 31572 states and 45522 transitions. Word has length 78 [2020-12-22 08:25:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:10,972 INFO L481 AbstractCegarLoop]: Abstraction has 31572 states and 45522 transitions. [2020-12-22 08:25:10,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31572 states and 45522 transitions. [2020-12-22 08:25:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:10,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:10,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:10,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:25:10,983 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1977851660, now seen corresponding path program 1 times [2020-12-22 08:25:10,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:10,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109347958] [2020-12-22 08:25:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:11,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109347958] [2020-12-22 08:25:11,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:11,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:11,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665684116] [2020-12-22 08:25:11,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:11,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:11,072 INFO L87 Difference]: Start difference. First operand 31572 states and 45522 transitions. Second operand 3 states. [2020-12-22 08:25:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:14,238 INFO L93 Difference]: Finished difference Result 68666 states and 98534 transitions. [2020-12-22 08:25:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:14,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:25:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:14,346 INFO L225 Difference]: With dead ends: 68666 [2020-12-22 08:25:14,346 INFO L226 Difference]: Without dead ends: 45608 [2020-12-22 08:25:14,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:14,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45608 states. [2020-12-22 08:25:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45608 to 43534. [2020-12-22 08:25:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43534 states. [2020-12-22 08:25:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43534 states to 43534 states and 61888 transitions. [2020-12-22 08:25:17,770 INFO L78 Accepts]: Start accepts. Automaton has 43534 states and 61888 transitions. Word has length 78 [2020-12-22 08:25:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:17,770 INFO L481 AbstractCegarLoop]: Abstraction has 43534 states and 61888 transitions. [2020-12-22 08:25:17,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 43534 states and 61888 transitions. [2020-12-22 08:25:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:17,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:17,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:17,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:25:17,784 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 440432859, now seen corresponding path program 1 times [2020-12-22 08:25:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868716387] [2020-12-22 08:25:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:25:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868716387] [2020-12-22 08:25:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:17,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:25:17,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64373296] [2020-12-22 08:25:17,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:25:17,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:25:17,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:17,851 INFO L87 Difference]: Start difference. First operand 43534 states and 61888 transitions. Second operand 3 states. [2020-12-22 08:25:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:21,233 INFO L93 Difference]: Finished difference Result 73077 states and 103213 transitions. [2020-12-22 08:25:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:25:21,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 08:25:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:21,304 INFO L225 Difference]: With dead ends: 73077 [2020-12-22 08:25:21,305 INFO L226 Difference]: Without dead ends: 45585 [2020-12-22 08:25:21,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:25:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45585 states. [2020-12-22 08:25:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45585 to 43755. [2020-12-22 08:25:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43755 states. [2020-12-22 08:25:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43755 states to 43755 states and 61230 transitions. [2020-12-22 08:25:24,674 INFO L78 Accepts]: Start accepts. Automaton has 43755 states and 61230 transitions. Word has length 78 [2020-12-22 08:25:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:24,674 INFO L481 AbstractCegarLoop]: Abstraction has 43755 states and 61230 transitions. [2020-12-22 08:25:24,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:25:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 43755 states and 61230 transitions. [2020-12-22 08:25:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:24,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:24,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:24,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:25:24,686 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash -739881820, now seen corresponding path program 1 times [2020-12-22 08:25:24,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:24,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366328807] [2020-12-22 08:25:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:25:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366328807] [2020-12-22 08:25:24,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:24,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:24,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692701329] [2020-12-22 08:25:24,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:24,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:24,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:24,788 INFO L87 Difference]: Start difference. First operand 43755 states and 61230 transitions. Second operand 6 states. [2020-12-22 08:25:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:30,913 INFO L93 Difference]: Finished difference Result 98723 states and 139830 transitions. [2020-12-22 08:25:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:30,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:25:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:31,061 INFO L225 Difference]: With dead ends: 98723 [2020-12-22 08:25:31,061 INFO L226 Difference]: Without dead ends: 85130 [2020-12-22 08:25:31,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:25:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85130 states. [2020-12-22 08:25:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85130 to 56579. [2020-12-22 08:25:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56579 states. [2020-12-22 08:25:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56579 states to 56579 states and 79202 transitions. [2020-12-22 08:25:35,927 INFO L78 Accepts]: Start accepts. Automaton has 56579 states and 79202 transitions. Word has length 78 [2020-12-22 08:25:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:35,928 INFO L481 AbstractCegarLoop]: Abstraction has 56579 states and 79202 transitions. [2020-12-22 08:25:35,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 56579 states and 79202 transitions. [2020-12-22 08:25:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:35,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:35,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:25:35,938 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash -542796544, now seen corresponding path program 1 times [2020-12-22 08:25:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:35,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169306897] [2020-12-22 08:25:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:25:36,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169306897] [2020-12-22 08:25:36,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:36,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:25:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722510665] [2020-12-22 08:25:36,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:36,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:36,060 INFO L87 Difference]: Start difference. First operand 56579 states and 79202 transitions. Second operand 6 states. [2020-12-22 08:25:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:25:44,008 INFO L93 Difference]: Finished difference Result 118670 states and 167826 transitions. [2020-12-22 08:25:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:25:44,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:25:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:25:44,158 INFO L225 Difference]: With dead ends: 118670 [2020-12-22 08:25:44,159 INFO L226 Difference]: Without dead ends: 97931 [2020-12-22 08:25:44,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:25:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97931 states. [2020-12-22 08:25:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97931 to 74851. [2020-12-22 08:25:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74851 states. [2020-12-22 08:25:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74851 states to 74851 states and 104688 transitions. [2020-12-22 08:25:50,561 INFO L78 Accepts]: Start accepts. Automaton has 74851 states and 104688 transitions. Word has length 78 [2020-12-22 08:25:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:25:50,562 INFO L481 AbstractCegarLoop]: Abstraction has 74851 states and 104688 transitions. [2020-12-22 08:25:50,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:25:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 74851 states and 104688 transitions. [2020-12-22 08:25:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:25:50,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:25:50,571 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:25:50,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:25:50,571 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:25:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:25:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1309904988, now seen corresponding path program 1 times [2020-12-22 08:25:50,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:25:50,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331643193] [2020-12-22 08:25:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:25:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:25:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 08:25:50,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331643193] [2020-12-22 08:25:50,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:25:50,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:25:50,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899747825] [2020-12-22 08:25:50,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:25:50,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:25:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:25:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:25:50,655 INFO L87 Difference]: Start difference. First operand 74851 states and 104688 transitions. Second operand 6 states. [2020-12-22 08:26:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:05,641 INFO L93 Difference]: Finished difference Result 255526 states and 356234 transitions. [2020-12-22 08:26:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:26:05,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:26:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:06,150 INFO L225 Difference]: With dead ends: 255526 [2020-12-22 08:26:06,150 INFO L226 Difference]: Without dead ends: 180782 [2020-12-22 08:26:06,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:26:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180782 states. [2020-12-22 08:26:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180782 to 177624. [2020-12-22 08:26:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177624 states. [2020-12-22 08:26:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177624 states to 177624 states and 246808 transitions. [2020-12-22 08:26:21,388 INFO L78 Accepts]: Start accepts. Automaton has 177624 states and 246808 transitions. Word has length 78 [2020-12-22 08:26:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:26:21,389 INFO L481 AbstractCegarLoop]: Abstraction has 177624 states and 246808 transitions. [2020-12-22 08:26:21,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:26:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 177624 states and 246808 transitions. [2020-12-22 08:26:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:26:21,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:26:21,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:26:21,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:26:21,399 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:26:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:26:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 209052831, now seen corresponding path program 1 times [2020-12-22 08:26:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:26:21,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223169206] [2020-12-22 08:26:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:26:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:26:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 08:26:21,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223169206] [2020-12-22 08:26:21,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:26:21,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:26:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813579689] [2020-12-22 08:26:21,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:26:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:26:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:26:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:26:21,848 INFO L87 Difference]: Start difference. First operand 177624 states and 246808 transitions. Second operand 6 states. [2020-12-22 08:26:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:26:43,219 INFO L93 Difference]: Finished difference Result 292804 states and 410479 transitions. [2020-12-22 08:26:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:26:43,220 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:26:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:26:43,745 INFO L225 Difference]: With dead ends: 292804 [2020-12-22 08:26:43,745 INFO L226 Difference]: Without dead ends: 270290 [2020-12-22 08:26:43,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:26:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270290 states. [2020-12-22 08:27:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270290 to 199496. [2020-12-22 08:27:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199496 states. [2020-12-22 08:27:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199496 states to 199496 states and 277256 transitions. [2020-12-22 08:27:01,785 INFO L78 Accepts]: Start accepts. Automaton has 199496 states and 277256 transitions. Word has length 78 [2020-12-22 08:27:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:27:01,785 INFO L481 AbstractCegarLoop]: Abstraction has 199496 states and 277256 transitions. [2020-12-22 08:27:01,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:27:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 199496 states and 277256 transitions. [2020-12-22 08:27:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:27:01,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:27:01,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:27:01,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:27:01,795 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:27:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:27:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 839835956, now seen corresponding path program 1 times [2020-12-22 08:27:01,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:27:01,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309186029] [2020-12-22 08:27:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:27:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:27:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:27:01,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309186029] [2020-12-22 08:27:01,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:27:01,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:27:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137892856] [2020-12-22 08:27:01,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:27:01,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:27:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:27:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:27:01,903 INFO L87 Difference]: Start difference. First operand 199496 states and 277256 transitions. Second operand 6 states.