/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.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:45:45,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:45:45,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:45:45,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:45:45,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:45:45,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:45:45,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:45:45,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:45:45,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:45:45,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:45:45,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:45:45,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:45:45,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:45:45,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:45:45,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:45:45,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:45:45,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:45:45,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:45:45,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:45:45,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:45:45,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:45:45,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:45:45,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:45:45,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:45:45,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:45:45,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:45:45,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:45:45,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:45:45,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:45:45,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:45:45,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:45:45,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:45:45,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:45:45,513 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:45:45,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:45:45,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:45:45,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:45:45,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:45:45,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:45:45,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:45:45,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:45:45,514 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:45:45,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:45:45,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:45:45,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:45:45,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:45:45,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:45:45,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:45:45,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:45:45,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:45:45,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:45:45,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:45:45,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:45:45,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:45:45,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:45:45,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:45:45,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:45:45,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:45:45,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:45:45,939 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:45:45,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:45:46,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5331fa5c9/1ae1cad75f224bca98bfa053a390ccd8/FLAG2e1a0865e [2020-12-22 08:45:46,855 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:45:46,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:45:46,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5331fa5c9/1ae1cad75f224bca98bfa053a390ccd8/FLAG2e1a0865e [2020-12-22 08:45:47,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5331fa5c9/1ae1cad75f224bca98bfa053a390ccd8 [2020-12-22 08:45:47,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:45:47,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:45:47,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:45:47,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:45:47,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:45:47,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:47,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3fb5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47, skipping insertion in model container [2020-12-22 08:45:47,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:47,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:45:47,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:45:47,500 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.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13500,13513] [2020-12-22 08:45:47,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:45:47,649 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:45:47,794 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.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13500,13513] [2020-12-22 08:45:47,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:45:47,947 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:45:47,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47 WrapperNode [2020-12-22 08:45:47,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:45:47,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:45:47,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:45:47,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:45:47,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:47,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:45:48,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:45:48,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:45:48,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:45:48,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (1/1) ... [2020-12-22 08:45:48,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:45:48,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:45:48,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:45:48,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:45:48,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (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 08:45:48,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:45:48,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:45:48,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:45:48,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:45:49,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:45:49,873 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:45:49,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:45:49 BoogieIcfgContainer [2020-12-22 08:45:49,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:45:49,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:45:49,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:45:49,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:45:49,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:45:47" (1/3) ... [2020-12-22 08:45:49,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f72f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:45:49, skipping insertion in model container [2020-12-22 08:45:49,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:45:47" (2/3) ... [2020-12-22 08:45:49,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f72f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:45:49, skipping insertion in model container [2020-12-22 08:45:49,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:45:49" (3/3) ... [2020-12-22 08:45:49,887 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2020-12-22 08:45:49,894 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:45:49,901 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:45:49,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:45:49,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:45:49,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:45:49,954 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:45:49,954 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:45:49,954 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:45:49,954 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:45:49,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:45:49,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:45:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states. [2020-12-22 08:45:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 08:45:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:49,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:49,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash 507379928, now seen corresponding path program 1 times [2020-12-22 08:45:50,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:50,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56198303] [2020-12-22 08:45:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:50,501 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 08:45:50,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56198303] [2020-12-22 08:45:50,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:50,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:45:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283056082] [2020-12-22 08:45:50,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:45:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:45:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:45:50,531 INFO L87 Difference]: Start difference. First operand 336 states. Second operand 4 states. [2020-12-22 08:45:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:50,741 INFO L93 Difference]: Finished difference Result 642 states and 1042 transitions. [2020-12-22 08:45:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:45:50,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 08:45:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:50,788 INFO L225 Difference]: With dead ends: 642 [2020-12-22 08:45:50,788 INFO L226 Difference]: Without dead ends: 333 [2020-12-22 08:45:50,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:45:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-12-22 08:45:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2020-12-22 08:45:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-22 08:45:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 513 transitions. [2020-12-22 08:45:50,925 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 513 transitions. Word has length 127 [2020-12-22 08:45:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:50,926 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 513 transitions. [2020-12-22 08:45:50,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:45:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 513 transitions. [2020-12-22 08:45:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 08:45:50,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:50,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:50,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:45:50,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1226582684, now seen corresponding path program 1 times [2020-12-22 08:45:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:50,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266643369] [2020-12-22 08:45:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:51,242 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 08:45:51,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266643369] [2020-12-22 08:45:51,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:51,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:45:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967620980] [2020-12-22 08:45:51,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:45:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:45:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:45:51,249 INFO L87 Difference]: Start difference. First operand 333 states and 513 transitions. Second operand 3 states. [2020-12-22 08:45:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:51,362 INFO L93 Difference]: Finished difference Result 804 states and 1267 transitions. [2020-12-22 08:45:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:45:51,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-12-22 08:45:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:51,368 INFO L225 Difference]: With dead ends: 804 [2020-12-22 08:45:51,368 INFO L226 Difference]: Without dead ends: 523 [2020-12-22 08:45:51,371 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 08:45:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-22 08:45:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2020-12-22 08:45:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-12-22 08:45:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 811 transitions. [2020-12-22 08:45:51,416 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 811 transitions. Word has length 157 [2020-12-22 08:45:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:51,417 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 811 transitions. [2020-12-22 08:45:51,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:45:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 811 transitions. [2020-12-22 08:45:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 08:45:51,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:51,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:51,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:45:51,422 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:51,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1375467905, now seen corresponding path program 1 times [2020-12-22 08:45:51,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:51,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116274439] [2020-12-22 08:45:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:51,634 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 08:45:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116274439] [2020-12-22 08:45:51,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:51,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:45:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307275232] [2020-12-22 08:45:51,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:45:51,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:51,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:45:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:45:51,643 INFO L87 Difference]: Start difference. First operand 521 states and 811 transitions. Second operand 3 states. [2020-12-22 08:45:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:51,773 INFO L93 Difference]: Finished difference Result 1322 states and 2090 transitions. [2020-12-22 08:45:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:45:51,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-22 08:45:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:51,782 INFO L225 Difference]: With dead ends: 1322 [2020-12-22 08:45:51,782 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 08:45:51,790 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 08:45:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 08:45:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 857. [2020-12-22 08:45:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 857 states. [2020-12-22 08:45:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1341 transitions. [2020-12-22 08:45:51,866 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1341 transitions. Word has length 160 [2020-12-22 08:45:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:51,877 INFO L481 AbstractCegarLoop]: Abstraction has 857 states and 1341 transitions. [2020-12-22 08:45:51,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:45:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1341 transitions. [2020-12-22 08:45:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:45:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:51,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:51,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:45:51,886 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash -401831765, now seen corresponding path program 1 times [2020-12-22 08:45:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448061513] [2020-12-22 08:45:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:52,099 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 08:45:52,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448061513] [2020-12-22 08:45:52,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:52,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:45:52,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445055071] [2020-12-22 08:45:52,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:45:52,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:45:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:45:52,105 INFO L87 Difference]: Start difference. First operand 857 states and 1341 transitions. Second operand 3 states. [2020-12-22 08:45:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:52,241 INFO L93 Difference]: Finished difference Result 2240 states and 3538 transitions. [2020-12-22 08:45:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:45:52,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-12-22 08:45:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:52,251 INFO L225 Difference]: With dead ends: 2240 [2020-12-22 08:45:52,251 INFO L226 Difference]: Without dead ends: 1447 [2020-12-22 08:45:52,254 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 08:45:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2020-12-22 08:45:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1445. [2020-12-22 08:45:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1445 states. [2020-12-22 08:45:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2261 transitions. [2020-12-22 08:45:52,349 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2261 transitions. Word has length 163 [2020-12-22 08:45:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:52,352 INFO L481 AbstractCegarLoop]: Abstraction has 1445 states and 2261 transitions. [2020-12-22 08:45:52,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:45:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2261 transitions. [2020-12-22 08:45:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 08:45:52,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:52,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:52,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:45:52,359 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1333810302, now seen corresponding path program 1 times [2020-12-22 08:45:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:52,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393806378] [2020-12-22 08:45:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:52,515 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 08:45:52,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393806378] [2020-12-22 08:45:52,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:52,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:45:52,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787550473] [2020-12-22 08:45:52,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:45:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:45:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:45:52,518 INFO L87 Difference]: Start difference. First operand 1445 states and 2261 transitions. Second operand 3 states. [2020-12-22 08:45:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:52,705 INFO L93 Difference]: Finished difference Result 3826 states and 6014 transitions. [2020-12-22 08:45:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:45:52,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2020-12-22 08:45:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:52,719 INFO L225 Difference]: With dead ends: 3826 [2020-12-22 08:45:52,720 INFO L226 Difference]: Without dead ends: 2451 [2020-12-22 08:45:52,723 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 08:45:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2020-12-22 08:45:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2449. [2020-12-22 08:45:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2449 states. [2020-12-22 08:45:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3813 transitions. [2020-12-22 08:45:52,887 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3813 transitions. Word has length 166 [2020-12-22 08:45:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:52,888 INFO L481 AbstractCegarLoop]: Abstraction has 2449 states and 3813 transitions. [2020-12-22 08:45:52,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:45:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3813 transitions. [2020-12-22 08:45:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:45:52,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:52,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:52,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:45:52,896 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:52,897 INFO L82 PathProgramCache]: Analyzing trace with hash -109197312, now seen corresponding path program 1 times [2020-12-22 08:45:52,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:52,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719865674] [2020-12-22 08:45:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:53,077 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 08:45:53,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719865674] [2020-12-22 08:45:53,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:53,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:45:53,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755241894] [2020-12-22 08:45:53,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:45:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:45:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:45:53,080 INFO L87 Difference]: Start difference. First operand 2449 states and 3813 transitions. Second operand 3 states. [2020-12-22 08:45:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:54,127 INFO L93 Difference]: Finished difference Result 6806 states and 10624 transitions. [2020-12-22 08:45:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:45:54,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-12-22 08:45:54,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:54,157 INFO L225 Difference]: With dead ends: 6806 [2020-12-22 08:45:54,158 INFO L226 Difference]: Without dead ends: 4808 [2020-12-22 08:45:54,164 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 08:45:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2020-12-22 08:45:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4806. [2020-12-22 08:45:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4806 states. [2020-12-22 08:45:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 7466 transitions. [2020-12-22 08:45:54,557 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 7466 transitions. Word has length 169 [2020-12-22 08:45:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:54,557 INFO L481 AbstractCegarLoop]: Abstraction has 4806 states and 7466 transitions. [2020-12-22 08:45:54,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:45:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 7466 transitions. [2020-12-22 08:45:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:45:54,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:54,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:54,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:45:54,570 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:54,571 INFO L82 PathProgramCache]: Analyzing trace with hash 419189472, now seen corresponding path program 1 times [2020-12-22 08:45:54,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:54,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813140967] [2020-12-22 08:45:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:54,728 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 08:45:54,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813140967] [2020-12-22 08:45:54,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:54,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:45:54,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788289904] [2020-12-22 08:45:54,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:45:54,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:45:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:45:54,732 INFO L87 Difference]: Start difference. First operand 4806 states and 7466 transitions. Second operand 6 states. [2020-12-22 08:45:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:56,070 INFO L93 Difference]: Finished difference Result 14231 states and 22099 transitions. [2020-12-22 08:45:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:45:56,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-12-22 08:45:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:56,124 INFO L225 Difference]: With dead ends: 14231 [2020-12-22 08:45:56,124 INFO L226 Difference]: Without dead ends: 9469 [2020-12-22 08:45:56,134 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 08:45:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9469 states. [2020-12-22 08:45:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9469 to 9467. [2020-12-22 08:45:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9467 states. [2020-12-22 08:45:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9467 states to 9467 states and 14584 transitions. [2020-12-22 08:45:56,845 INFO L78 Accepts]: Start accepts. Automaton has 9467 states and 14584 transitions. Word has length 169 [2020-12-22 08:45:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:56,846 INFO L481 AbstractCegarLoop]: Abstraction has 9467 states and 14584 transitions. [2020-12-22 08:45:56,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:45:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9467 states and 14584 transitions. [2020-12-22 08:45:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:45:56,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:56,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:56,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:45:56,874 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1351645625, now seen corresponding path program 1 times [2020-12-22 08:45:56,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:56,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100277599] [2020-12-22 08:45:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:57,074 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 08:45:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100277599] [2020-12-22 08:45:57,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:57,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:45:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783526112] [2020-12-22 08:45:57,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:45:57,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:45:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:45:57,077 INFO L87 Difference]: Start difference. First operand 9467 states and 14584 transitions. Second operand 6 states. [2020-12-22 08:45:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:58,652 INFO L93 Difference]: Finished difference Result 26137 states and 40200 transitions. [2020-12-22 08:45:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:45:58,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-12-22 08:45:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:58,719 INFO L225 Difference]: With dead ends: 26137 [2020-12-22 08:45:58,719 INFO L226 Difference]: Without dead ends: 16773 [2020-12-22 08:45:58,736 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 08:45:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16773 states. [2020-12-22 08:45:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16773 to 16771. [2020-12-22 08:45:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16771 states. [2020-12-22 08:45:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16771 states to 16771 states and 25612 transitions. [2020-12-22 08:45:59,986 INFO L78 Accepts]: Start accepts. Automaton has 16771 states and 25612 transitions. Word has length 169 [2020-12-22 08:45:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:59,987 INFO L481 AbstractCegarLoop]: Abstraction has 16771 states and 25612 transitions. [2020-12-22 08:45:59,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:45:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16771 states and 25612 transitions. [2020-12-22 08:46:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:46:00,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:00,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:00,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:46:00,042 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1343118814, now seen corresponding path program 1 times [2020-12-22 08:46:00,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:00,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706810628] [2020-12-22 08:46:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:00,336 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 08:46:00,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706810628] [2020-12-22 08:46:00,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:00,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:46:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480446473] [2020-12-22 08:46:00,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:46:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:46:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:46:00,344 INFO L87 Difference]: Start difference. First operand 16771 states and 25612 transitions. Second operand 6 states. [2020-12-22 08:46:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:01,869 INFO L93 Difference]: Finished difference Result 33047 states and 50406 transitions. [2020-12-22 08:46:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:46:01,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2020-12-22 08:46:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:01,918 INFO L225 Difference]: With dead ends: 33047 [2020-12-22 08:46:01,919 INFO L226 Difference]: Without dead ends: 17480 [2020-12-22 08:46:01,944 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 08:46:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17480 states. [2020-12-22 08:46:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17480 to 17478. [2020-12-22 08:46:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17478 states. [2020-12-22 08:46:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17478 states to 17478 states and 26569 transitions. [2020-12-22 08:46:03,310 INFO L78 Accepts]: Start accepts. Automaton has 17478 states and 26569 transitions. Word has length 169 [2020-12-22 08:46:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:03,311 INFO L481 AbstractCegarLoop]: Abstraction has 17478 states and 26569 transitions. [2020-12-22 08:46:03,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:46:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17478 states and 26569 transitions. [2020-12-22 08:46:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:46:03,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:03,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:46:03,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:46:03,356 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1604266649, now seen corresponding path program 1 times [2020-12-22 08:46:03,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:03,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272220147] [2020-12-22 08:46:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:03,487 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 08:46:03,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272220147] [2020-12-22 08:46:03,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:03,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:46:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579441143] [2020-12-22 08:46:03,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:46:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:46:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:46:03,490 INFO L87 Difference]: Start difference. First operand 17478 states and 26569 transitions. Second operand 5 states. [2020-12-22 08:46:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:04,865 INFO L93 Difference]: Finished difference Result 34889 states and 53057 transitions. [2020-12-22 08:46:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:46:04,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-12-22 08:46:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:04,909 INFO L225 Difference]: With dead ends: 34889 [2020-12-22 08:46:04,909 INFO L226 Difference]: Without dead ends: 17478 [2020-12-22 08:46:04,934 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 08:46:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2020-12-22 08:46:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 17478. [2020-12-22 08:46:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17478 states. [2020-12-22 08:46:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17478 states to 17478 states and 26383 transitions. [2020-12-22 08:46:05,978 INFO L78 Accepts]: Start accepts. Automaton has 17478 states and 26383 transitions. Word has length 169 [2020-12-22 08:46:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:05,978 INFO L481 AbstractCegarLoop]: Abstraction has 17478 states and 26383 transitions. [2020-12-22 08:46:05,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:46:05,978 INFO L276 IsEmpty]: Start isEmpty. Operand 17478 states and 26383 transitions. [2020-12-22 08:46:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 08:46:06,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:06,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:06,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:46:06,034 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1460997442, now seen corresponding path program 1 times [2020-12-22 08:46:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:06,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693793490] [2020-12-22 08:46:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:06,185 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 08:46:06,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693793490] [2020-12-22 08:46:06,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:06,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:46:06,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99770797] [2020-12-22 08:46:06,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:46:06,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:06,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:46:06,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:46:06,187 INFO L87 Difference]: Start difference. First operand 17478 states and 26383 transitions. Second operand 7 states. [2020-12-22 08:46:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:14,588 INFO L93 Difference]: Finished difference Result 167294 states and 252385 transitions. [2020-12-22 08:46:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:46:14,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2020-12-22 08:46:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:15,127 INFO L225 Difference]: With dead ends: 167294 [2020-12-22 08:46:15,127 INFO L226 Difference]: Without dead ends: 149923 [2020-12-22 08:46:15,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:46:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149923 states. [2020-12-22 08:46:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149923 to 34867. [2020-12-22 08:46:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34867 states. [2020-12-22 08:46:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 51612 transitions. [2020-12-22 08:46:19,987 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 51612 transitions. Word has length 169 [2020-12-22 08:46:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:19,987 INFO L481 AbstractCegarLoop]: Abstraction has 34867 states and 51612 transitions. [2020-12-22 08:46:19,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:46:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 51612 transitions. [2020-12-22 08:46:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-22 08:46:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:20,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:20,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:46:20,046 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash -544834568, now seen corresponding path program 1 times [2020-12-22 08:46:20,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:20,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89492202] [2020-12-22 08:46:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:20,124 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 08:46:20,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89492202] [2020-12-22 08:46:20,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:20,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:46:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829606182] [2020-12-22 08:46:20,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:46:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:46:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:46:20,126 INFO L87 Difference]: Start difference. First operand 34867 states and 51612 transitions. Second operand 3 states. [2020-12-22 08:46:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:24,331 INFO L93 Difference]: Finished difference Result 95788 states and 141345 transitions. [2020-12-22 08:46:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:46:24,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2020-12-22 08:46:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:24,449 INFO L225 Difference]: With dead ends: 95788 [2020-12-22 08:46:24,449 INFO L226 Difference]: Without dead ends: 60961 [2020-12-22 08:46:24,514 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 08:46:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60961 states. [2020-12-22 08:46:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60961 to 60959. [2020-12-22 08:46:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60959 states. [2020-12-22 08:46:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60959 states to 60959 states and 89057 transitions. [2020-12-22 08:46:29,171 INFO L78 Accepts]: Start accepts. Automaton has 60959 states and 89057 transitions. Word has length 172 [2020-12-22 08:46:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:29,171 INFO L481 AbstractCegarLoop]: Abstraction has 60959 states and 89057 transitions. [2020-12-22 08:46:29,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:46:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 60959 states and 89057 transitions. [2020-12-22 08:46:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:46:29,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:29,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:29,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:46:29,264 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:29,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1220882818, now seen corresponding path program 1 times [2020-12-22 08:46:29,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:29,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015543790] [2020-12-22 08:46:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:29,358 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 08:46:29,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015543790] [2020-12-22 08:46:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:29,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:46:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880002334] [2020-12-22 08:46:29,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:46:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:46:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:46:29,361 INFO L87 Difference]: Start difference. First operand 60959 states and 89057 transitions. Second operand 3 states. [2020-12-22 08:46:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:46:34,930 INFO L93 Difference]: Finished difference Result 135923 states and 198222 transitions. [2020-12-22 08:46:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:46:34,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-12-22 08:46:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:46:35,038 INFO L225 Difference]: With dead ends: 135923 [2020-12-22 08:46:35,038 INFO L226 Difference]: Without dead ends: 75032 [2020-12-22 08:46:35,107 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 08:46:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75032 states. [2020-12-22 08:46:40,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75032 to 74742. [2020-12-22 08:46:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74742 states. [2020-12-22 08:46:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74742 states to 74742 states and 107817 transitions. [2020-12-22 08:46:40,773 INFO L78 Accepts]: Start accepts. Automaton has 74742 states and 107817 transitions. Word has length 173 [2020-12-22 08:46:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:46:40,773 INFO L481 AbstractCegarLoop]: Abstraction has 74742 states and 107817 transitions. [2020-12-22 08:46:40,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:46:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 74742 states and 107817 transitions. [2020-12-22 08:46:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:46:41,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:46:41,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:46:41,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:46:41,133 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:46:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:46:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash -627128893, now seen corresponding path program 1 times [2020-12-22 08:46:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:46:41,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851472139] [2020-12-22 08:46:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:46:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:46:41,403 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 08:46:41,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851472139] [2020-12-22 08:46:41,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:46:41,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:46:41,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831254079] [2020-12-22 08:46:41,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:46:41,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:46:41,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:46:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:46:41,406 INFO L87 Difference]: Start difference. First operand 74742 states and 107817 transitions. Second operand 7 states. [2020-12-22 08:47:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:04,382 INFO L93 Difference]: Finished difference Result 383443 states and 553321 transitions. [2020-12-22 08:47:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:47:04,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-12-22 08:47:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:05,012 INFO L225 Difference]: With dead ends: 383443 [2020-12-22 08:47:05,012 INFO L226 Difference]: Without dead ends: 323447 [2020-12-22 08:47:05,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:47:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323447 states. [2020-12-22 08:47:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323447 to 145339. [2020-12-22 08:47:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145339 states. [2020-12-22 08:47:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145339 states to 145339 states and 208315 transitions. [2020-12-22 08:47:19,821 INFO L78 Accepts]: Start accepts. Automaton has 145339 states and 208315 transitions. Word has length 173 [2020-12-22 08:47:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:47:19,822 INFO L481 AbstractCegarLoop]: Abstraction has 145339 states and 208315 transitions. [2020-12-22 08:47:19,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:47:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145339 states and 208315 transitions. [2020-12-22 08:47:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:47:19,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:47:19,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:47:19,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:47:19,994 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:47:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:47:19,994 INFO L82 PathProgramCache]: Analyzing trace with hash -109397183, now seen corresponding path program 1 times [2020-12-22 08:47:19,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:47:19,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137964018] [2020-12-22 08:47:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:47:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:47:20,177 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 08:47:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137964018] [2020-12-22 08:47:20,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:47:20,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:47:20,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138407485] [2020-12-22 08:47:20,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:47:20,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:47:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:47:20,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:47:20,180 INFO L87 Difference]: Start difference. First operand 145339 states and 208315 transitions. Second operand 7 states. [2020-12-22 08:47:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:47:50,475 INFO L93 Difference]: Finished difference Result 436614 states and 628733 transitions. [2020-12-22 08:47:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:47:50,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-12-22 08:47:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:47:51,339 INFO L225 Difference]: With dead ends: 436614 [2020-12-22 08:47:51,339 INFO L226 Difference]: Without dead ends: 390744 [2020-12-22 08:47:51,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 08:47:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390744 states. [2020-12-22 08:48:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390744 to 229241. [2020-12-22 08:48:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229241 states. [2020-12-22 08:48:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229241 states to 229241 states and 327495 transitions. [2020-12-22 08:48:14,785 INFO L78 Accepts]: Start accepts. Automaton has 229241 states and 327495 transitions. Word has length 173 [2020-12-22 08:48:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:48:14,786 INFO L481 AbstractCegarLoop]: Abstraction has 229241 states and 327495 transitions. [2020-12-22 08:48:14,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:48:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 229241 states and 327495 transitions. [2020-12-22 08:48:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 08:48:15,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:48:15,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:48:15,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:48:15,120 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:48:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:48:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1341711197, now seen corresponding path program 1 times [2020-12-22 08:48:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:48:15,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152776382] [2020-12-22 08:48:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:48:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:48:15,330 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 08:48:15,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152776382] [2020-12-22 08:48:15,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:48:15,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:48:15,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200258799] [2020-12-22 08:48:15,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:48:15,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:48:15,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:48:15,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:48:15,333 INFO L87 Difference]: Start difference. First operand 229241 states and 327495 transitions. Second operand 7 states. [2020-12-22 08:48:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:48:51,447 INFO L93 Difference]: Finished difference Result 478278 states and 688185 transitions. [2020-12-22 08:48:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:48:51,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-12-22 08:48:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted.