/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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:19:41,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:19:41,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:19:41,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:19:41,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:19:41,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:19:41,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:19:41,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:19:41,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:19:41,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:19:41,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:19:41,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:19:41,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:19:41,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:19:41,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:19:41,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:19:41,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:19:41,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:19:41,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:19:41,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:19:41,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:19:41,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:19:41,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:19:41,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:19:41,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:19:41,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:19:41,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:19:41,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:19:41,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:19:41,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:19:41,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:19:41,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:19:41,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:19:41,368 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:19:41,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:19:41,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:19:41,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:19:41,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:19:41,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:19:41,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:19:41,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:19:41,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:19:41,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:19:41,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:19:41,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:19:41,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:19:41,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:19:41,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:19:41,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:19:41,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:19:41,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:19:41,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:19:41,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:19:41,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:19:41,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:19:41,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:19:41,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:19:41,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:19:41,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:19:41,792 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:19:41,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:19:41,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7d25aa5/457fd74b76b94d1ab4bbab9c85ca2cd9/FLAG712a5d8e1 [2020-12-22 10:19:42,963 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:19:42,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:19:43,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7d25aa5/457fd74b76b94d1ab4bbab9c85ca2cd9/FLAG712a5d8e1 [2020-12-22 10:19:43,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e7d25aa5/457fd74b76b94d1ab4bbab9c85ca2cd9 [2020-12-22 10:19:43,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:19:43,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:19:43,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:43,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:19:43,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:19:43,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:43" (1/1) ... [2020-12-22 10:19:43,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6b7cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:43, skipping insertion in model container [2020-12-22 10:19:43,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:19:43" (1/1) ... [2020-12-22 10:19:43,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:19:43,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:19:44,015 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c[26884,26897] [2020-12-22 10:19:44,081 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c[33702,33715] [2020-12-22 10:19:44,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:45,004 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:19:45,098 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c[26884,26897] [2020-12-22 10:19:45,112 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/combinations/pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c[33702,33715] [2020-12-22 10:19:45,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:19:45,737 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:19:45,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45 WrapperNode [2020-12-22 10:19:45,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:19:45,740 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:45,740 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:19:45,741 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:19:45,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:45,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:19:46,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:19:46,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:19:46,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:19:46,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:46,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:47,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (1/1) ... [2020-12-22 10:19:47,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:19:47,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:19:47,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:19:47,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:19:47,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (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 10:19:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:19:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:19:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:19:47,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:19:53,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:19:53,387 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:19:53,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:53 BoogieIcfgContainer [2020-12-22 10:19:53,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:19:53,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:19:53,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:19:53,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:19:53,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:19:43" (1/3) ... [2020-12-22 10:19:53,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4580a126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:53, skipping insertion in model container [2020-12-22 10:19:53,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:19:45" (2/3) ... [2020-12-22 10:19:53,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4580a126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:19:53, skipping insertion in model container [2020-12-22 10:19:53,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:19:53" (3/3) ... [2020-12-22 10:19:53,407 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals+Problem12_label04.c [2020-12-22 10:19:53,414 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:19:53,421 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:19:53,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:19:53,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:19:53,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:19:53,497 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:19:53,497 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:19:53,497 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:19:53,497 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:19:53,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:19:53,498 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:19:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states. [2020-12-22 10:19:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:53,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:53,562 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] [2020-12-22 10:19:53,562 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:53,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2107180874, now seen corresponding path program 1 times [2020-12-22 10:19:53,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:53,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248766531] [2020-12-22 10:19:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:53,862 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 10:19:53,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248766531] [2020-12-22 10:19:53,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:53,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:19:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268670883] [2020-12-22 10:19:53,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:19:53,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:19:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:53,890 INFO L87 Difference]: Start difference. First operand 963 states. Second operand 2 states. [2020-12-22 10:19:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:53,994 INFO L93 Difference]: Finished difference Result 1859 states and 3512 transitions. [2020-12-22 10:19:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:19:53,995 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:19:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:54,054 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:19:54,054 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:54,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:19:54,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1688 transitions. [2020-12-22 10:19:54,202 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1688 transitions. Word has length 46 [2020-12-22 10:19:54,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:54,202 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1688 transitions. [2020-12-22 10:19:54,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:19:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1688 transitions. [2020-12-22 10:19:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:19:54,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:54,205 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] [2020-12-22 10:19:54,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:19:54,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash 815979124, now seen corresponding path program 1 times [2020-12-22 10:19:54,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:54,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420522186] [2020-12-22 10:19:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:54,372 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 10:19:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420522186] [2020-12-22 10:19:54,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:54,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:19:54,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804190954] [2020-12-22 10:19:54,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:19:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:19:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:19:54,379 INFO L87 Difference]: Start difference. First operand 897 states and 1688 transitions. Second operand 5 states. [2020-12-22 10:19:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:19:54,597 INFO L93 Difference]: Finished difference Result 977 states and 1813 transitions. [2020-12-22 10:19:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:19:54,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:19:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:19:54,605 INFO L225 Difference]: With dead ends: 977 [2020-12-22 10:19:54,605 INFO L226 Difference]: Without dead ends: 897 [2020-12-22 10:19:54,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:19:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-22 10:19:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2020-12-22 10:19:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 10:19:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1627 transitions. [2020-12-22 10:19:54,637 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1627 transitions. Word has length 46 [2020-12-22 10:19:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:19:54,638 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1627 transitions. [2020-12-22 10:19:54,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:19:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1627 transitions. [2020-12-22 10:19:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 10:19:54,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:19:54,645 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] [2020-12-22 10:19:54,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:19:54,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:19:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:19:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash -430057188, now seen corresponding path program 1 times [2020-12-22 10:19:54,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:19:54,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564877583] [2020-12-22 10:19:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:19:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:19:54,900 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 10:19:54,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564877583] [2020-12-22 10:19:54,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:19:54,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:19:54,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558360484] [2020-12-22 10:19:54,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:19:54,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:19:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:19:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:19:54,903 INFO L87 Difference]: Start difference. First operand 897 states and 1627 transitions. Second operand 4 states. [2020-12-22 10:20:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:06,413 INFO L93 Difference]: Finished difference Result 3152 states and 5936 transitions. [2020-12-22 10:20:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:06,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 10:20:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:06,430 INFO L225 Difference]: With dead ends: 3152 [2020-12-22 10:20:06,430 INFO L226 Difference]: Without dead ends: 2399 [2020-12-22 10:20:06,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 10:20:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2020-12-22 10:20:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2020-12-22 10:20:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 10:20:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3603 transitions. [2020-12-22 10:20:06,506 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3603 transitions. Word has length 61 [2020-12-22 10:20:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:06,507 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3603 transitions. [2020-12-22 10:20:06,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3603 transitions. [2020-12-22 10:20:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:06,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:06,510 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] [2020-12-22 10:20:06,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:20:06,511 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:06,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1090783836, now seen corresponding path program 1 times [2020-12-22 10:20:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:06,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717767829] [2020-12-22 10:20:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:06,744 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 10:20:06,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717767829] [2020-12-22 10:20:06,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:06,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:06,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035162643] [2020-12-22 10:20:06,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:06,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:06,751 INFO L87 Difference]: Start difference. First operand 2399 states and 3603 transitions. Second operand 3 states. [2020-12-22 10:20:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:06,809 INFO L93 Difference]: Finished difference Result 2545 states and 3835 transitions. [2020-12-22 10:20:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:06,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:06,827 INFO L225 Difference]: With dead ends: 2545 [2020-12-22 10:20:06,828 INFO L226 Difference]: Without dead ends: 2469 [2020-12-22 10:20:06,829 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 10:20:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2020-12-22 10:20:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2020-12-22 10:20:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2467 states. [2020-12-22 10:20:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3712 transitions. [2020-12-22 10:20:06,914 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3712 transitions. Word has length 106 [2020-12-22 10:20:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:06,916 INFO L481 AbstractCegarLoop]: Abstraction has 2467 states and 3712 transitions. [2020-12-22 10:20:06,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3712 transitions. [2020-12-22 10:20:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:06,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:06,919 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] [2020-12-22 10:20:06,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:20:06,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 326222874, now seen corresponding path program 1 times [2020-12-22 10:20:06,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:06,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732229841] [2020-12-22 10:20:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,163 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 10:20:07,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732229841] [2020-12-22 10:20:07,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101410644] [2020-12-22 10:20:07,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,166 INFO L87 Difference]: Start difference. First operand 2467 states and 3712 transitions. Second operand 3 states. [2020-12-22 10:20:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,227 INFO L93 Difference]: Finished difference Result 2743 states and 4152 transitions. [2020-12-22 10:20:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:07,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,244 INFO L225 Difference]: With dead ends: 2743 [2020-12-22 10:20:07,244 INFO L226 Difference]: Without dead ends: 2599 [2020-12-22 10:20:07,246 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 10:20:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-12-22 10:20:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 2597. [2020-12-22 10:20:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2020-12-22 10:20:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3919 transitions. [2020-12-22 10:20:07,332 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3919 transitions. Word has length 106 [2020-12-22 10:20:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,333 INFO L481 AbstractCegarLoop]: Abstraction has 2597 states and 3919 transitions. [2020-12-22 10:20:07,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3919 transitions. [2020-12-22 10:20:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:07,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,343 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] [2020-12-22 10:20:07,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:20:07,343 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1573731728, now seen corresponding path program 1 times [2020-12-22 10:20:07,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377188005] [2020-12-22 10:20:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,475 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 10:20:07,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377188005] [2020-12-22 10:20:07,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023556461] [2020-12-22 10:20:07,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,478 INFO L87 Difference]: Start difference. First operand 2597 states and 3919 transitions. Second operand 3 states. [2020-12-22 10:20:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,553 INFO L93 Difference]: Finished difference Result 3121 states and 4753 transitions. [2020-12-22 10:20:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:07,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,570 INFO L225 Difference]: With dead ends: 3121 [2020-12-22 10:20:07,570 INFO L226 Difference]: Without dead ends: 2847 [2020-12-22 10:20:07,572 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 10:20:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-22 10:20:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2845. [2020-12-22 10:20:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2845 states. [2020-12-22 10:20:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 4311 transitions. [2020-12-22 10:20:07,669 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 4311 transitions. Word has length 106 [2020-12-22 10:20:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:07,670 INFO L481 AbstractCegarLoop]: Abstraction has 2845 states and 4311 transitions. [2020-12-22 10:20:07,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 4311 transitions. [2020-12-22 10:20:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:07,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:07,672 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] [2020-12-22 10:20:07,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:20:07,673 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:07,677 INFO L82 PathProgramCache]: Analyzing trace with hash 832299526, now seen corresponding path program 1 times [2020-12-22 10:20:07,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:07,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673384146] [2020-12-22 10:20:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:07,861 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 10:20:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673384146] [2020-12-22 10:20:07,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:07,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:07,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573064636] [2020-12-22 10:20:07,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:07,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:07,865 INFO L87 Difference]: Start difference. First operand 2845 states and 4311 transitions. Second operand 3 states. [2020-12-22 10:20:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:07,949 INFO L93 Difference]: Finished difference Result 3841 states and 5889 transitions. [2020-12-22 10:20:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:07,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:07,970 INFO L225 Difference]: With dead ends: 3841 [2020-12-22 10:20:07,970 INFO L226 Difference]: Without dead ends: 3319 [2020-12-22 10:20:07,976 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 10:20:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2020-12-22 10:20:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3317. [2020-12-22 10:20:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3317 states. [2020-12-22 10:20:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 5051 transitions. [2020-12-22 10:20:08,088 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 5051 transitions. Word has length 106 [2020-12-22 10:20:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:08,089 INFO L481 AbstractCegarLoop]: Abstraction has 3317 states and 5051 transitions. [2020-12-22 10:20:08,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 5051 transitions. [2020-12-22 10:20:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:08,091 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] [2020-12-22 10:20:08,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:20:08,091 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2050284924, now seen corresponding path program 1 times [2020-12-22 10:20:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624765543] [2020-12-22 10:20:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:08,366 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 10:20:08,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624765543] [2020-12-22 10:20:08,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:08,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:08,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732311439] [2020-12-22 10:20:08,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:08,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:08,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:08,369 INFO L87 Difference]: Start difference. First operand 3317 states and 5051 transitions. Second operand 10 states. [2020-12-22 10:20:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:09,769 INFO L93 Difference]: Finished difference Result 19221 states and 30155 transitions. [2020-12-22 10:20:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:20:09,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:20:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:09,850 INFO L225 Difference]: With dead ends: 19221 [2020-12-22 10:20:09,850 INFO L226 Difference]: Without dead ends: 18227 [2020-12-22 10:20:09,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:20:09,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18227 states. [2020-12-22 10:20:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18227 to 4309. [2020-12-22 10:20:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-12-22 10:20:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 6587 transitions. [2020-12-22 10:20:10,261 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 6587 transitions. Word has length 106 [2020-12-22 10:20:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:10,262 INFO L481 AbstractCegarLoop]: Abstraction has 4309 states and 6587 transitions. [2020-12-22 10:20:10,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 6587 transitions. [2020-12-22 10:20:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:10,264 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] [2020-12-22 10:20:10,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:20:10,264 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1813103660, now seen corresponding path program 1 times [2020-12-22 10:20:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:10,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780899731] [2020-12-22 10:20:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:10,388 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 10:20:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780899731] [2020-12-22 10:20:10,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:10,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:10,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302434769] [2020-12-22 10:20:10,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:10,392 INFO L87 Difference]: Start difference. First operand 4309 states and 6587 transitions. Second operand 3 states. [2020-12-22 10:20:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:10,659 INFO L93 Difference]: Finished difference Result 7251 states and 11183 transitions. [2020-12-22 10:20:10,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:10,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:10,674 INFO L225 Difference]: With dead ends: 7251 [2020-12-22 10:20:10,674 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:10,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8053 transitions. [2020-12-22 10:20:10,953 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8053 transitions. Word has length 108 [2020-12-22 10:20:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:10,954 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8053 transitions. [2020-12-22 10:20:10,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8053 transitions. [2020-12-22 10:20:10,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:10,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:10,956 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] [2020-12-22 10:20:10,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:20:10,956 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1879597172, now seen corresponding path program 1 times [2020-12-22 10:20:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:10,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116887399] [2020-12-22 10:20:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:11,546 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 10:20:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116887399] [2020-12-22 10:20:11,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:11,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:11,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203930819] [2020-12-22 10:20:11,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:11,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:11,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:11,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:11,549 INFO L87 Difference]: Start difference. First operand 5263 states and 8053 transitions. Second operand 10 states. [2020-12-22 10:20:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:12,495 INFO L93 Difference]: Finished difference Result 8203 states and 12623 transitions. [2020-12-22 10:20:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:12,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:20:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:12,507 INFO L225 Difference]: With dead ends: 8203 [2020-12-22 10:20:12,508 INFO L226 Difference]: Without dead ends: 5265 [2020-12-22 10:20:12,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:20:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2020-12-22 10:20:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5263. [2020-12-22 10:20:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5263 states. [2020-12-22 10:20:12,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 8029 transitions. [2020-12-22 10:20:12,791 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 8029 transitions. Word has length 108 [2020-12-22 10:20:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:12,791 INFO L481 AbstractCegarLoop]: Abstraction has 5263 states and 8029 transitions. [2020-12-22 10:20:12,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 8029 transitions. [2020-12-22 10:20:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:12,793 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] [2020-12-22 10:20:12,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:20:12,794 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 621051568, now seen corresponding path program 1 times [2020-12-22 10:20:12,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:12,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509724254] [2020-12-22 10:20:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:12,890 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 10:20:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509724254] [2020-12-22 10:20:12,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:12,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635663425] [2020-12-22 10:20:12,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:12,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:12,893 INFO L87 Difference]: Start difference. First operand 5263 states and 8029 transitions. Second operand 3 states. [2020-12-22 10:20:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:13,294 INFO L93 Difference]: Finished difference Result 10851 states and 16639 transitions. [2020-12-22 10:20:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:13,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:13,316 INFO L225 Difference]: With dead ends: 10851 [2020-12-22 10:20:13,316 INFO L226 Difference]: Without dead ends: 7913 [2020-12-22 10:20:13,323 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 10:20:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7913 states. [2020-12-22 10:20:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7913 to 7911. [2020-12-22 10:20:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7911 states. [2020-12-22 10:20:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 12045 transitions. [2020-12-22 10:20:13,936 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 12045 transitions. Word has length 108 [2020-12-22 10:20:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:13,937 INFO L481 AbstractCegarLoop]: Abstraction has 7911 states and 12045 transitions. [2020-12-22 10:20:13,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 12045 transitions. [2020-12-22 10:20:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:13,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:13,939 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] [2020-12-22 10:20:13,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:20:13,940 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 894739280, now seen corresponding path program 1 times [2020-12-22 10:20:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:13,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899570372] [2020-12-22 10:20:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:14,049 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 10:20:14,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899570372] [2020-12-22 10:20:14,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:14,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:14,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775423750] [2020-12-22 10:20:14,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:14,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:14,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:14,057 INFO L87 Difference]: Start difference. First operand 7911 states and 12045 transitions. Second operand 3 states. [2020-12-22 10:20:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:14,820 INFO L93 Difference]: Finished difference Result 18507 states and 28207 transitions. [2020-12-22 10:20:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:14,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:14,852 INFO L225 Difference]: With dead ends: 18507 [2020-12-22 10:20:14,852 INFO L226 Difference]: Without dead ends: 12921 [2020-12-22 10:20:14,864 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 10:20:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2020-12-22 10:20:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 12919. [2020-12-22 10:20:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12919 states. [2020-12-22 10:20:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12919 states to 12919 states and 19549 transitions. [2020-12-22 10:20:15,891 INFO L78 Accepts]: Start accepts. Automaton has 12919 states and 19549 transitions. Word has length 108 [2020-12-22 10:20:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:15,891 INFO L481 AbstractCegarLoop]: Abstraction has 12919 states and 19549 transitions. [2020-12-22 10:20:15,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12919 states and 19549 transitions. [2020-12-22 10:20:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:15,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:15,893 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] [2020-12-22 10:20:15,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:20:15,893 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1581156368, now seen corresponding path program 1 times [2020-12-22 10:20:15,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:15,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790791163] [2020-12-22 10:20:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:15,985 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 10:20:15,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790791163] [2020-12-22 10:20:15,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346170377] [2020-12-22 10:20:15,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:15,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:15,993 INFO L87 Difference]: Start difference. First operand 12919 states and 19549 transitions. Second operand 3 states. [2020-12-22 10:20:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:17,672 INFO L93 Difference]: Finished difference Result 32955 states and 49759 transitions. [2020-12-22 10:20:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:17,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:17,736 INFO L225 Difference]: With dead ends: 32955 [2020-12-22 10:20:17,736 INFO L226 Difference]: Without dead ends: 22361 [2020-12-22 10:20:17,761 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 10:20:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22361 states. [2020-12-22 10:20:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22361 to 22359. [2020-12-22 10:20:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22359 states. [2020-12-22 10:20:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22359 states to 22359 states and 33501 transitions. [2020-12-22 10:20:19,434 INFO L78 Accepts]: Start accepts. Automaton has 22359 states and 33501 transitions. Word has length 108 [2020-12-22 10:20:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:19,434 INFO L481 AbstractCegarLoop]: Abstraction has 22359 states and 33501 transitions. [2020-12-22 10:20:19,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22359 states and 33501 transitions. [2020-12-22 10:20:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:19,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:19,436 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] [2020-12-22 10:20:19,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:20:19,437 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1401750384, now seen corresponding path program 1 times [2020-12-22 10:20:19,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:19,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813035687] [2020-12-22 10:20:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:19,532 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 10:20:19,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813035687] [2020-12-22 10:20:19,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:19,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:19,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450791077] [2020-12-22 10:20:19,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:19,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:19,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:19,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:19,534 INFO L87 Difference]: Start difference. First operand 22359 states and 33501 transitions. Second operand 3 states. [2020-12-22 10:20:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:21,869 INFO L93 Difference]: Finished difference Result 60123 states and 89695 transitions. [2020-12-22 10:20:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:21,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:21,964 INFO L225 Difference]: With dead ends: 60123 [2020-12-22 10:20:21,964 INFO L226 Difference]: Without dead ends: 40089 [2020-12-22 10:20:21,992 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 10:20:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40089 states. [2020-12-22 10:20:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40089 to 40087. [2020-12-22 10:20:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2020-12-22 10:20:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 59293 transitions. [2020-12-22 10:20:24,722 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 59293 transitions. Word has length 108 [2020-12-22 10:20:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:24,723 INFO L481 AbstractCegarLoop]: Abstraction has 40087 states and 59293 transitions. [2020-12-22 10:20:24,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 59293 transitions. [2020-12-22 10:20:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:24,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:24,724 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] [2020-12-22 10:20:24,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:20:24,725 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2018214719, now seen corresponding path program 1 times [2020-12-22 10:20:24,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:24,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210699847] [2020-12-22 10:20:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:24,944 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 10:20:24,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210699847] [2020-12-22 10:20:24,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:24,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:20:24,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671058805] [2020-12-22 10:20:24,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:20:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:20:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:20:24,947 INFO L87 Difference]: Start difference. First operand 40087 states and 59293 transitions. Second operand 8 states. [2020-12-22 10:20:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:29,955 INFO L93 Difference]: Finished difference Result 72254 states and 105870 transitions. [2020-12-22 10:20:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:29,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:20:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:30,117 INFO L225 Difference]: With dead ends: 72254 [2020-12-22 10:20:30,118 INFO L226 Difference]: Without dead ends: 72252 [2020-12-22 10:20:30,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72252 states. [2020-12-22 10:20:33,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72252 to 41623. [2020-12-22 10:20:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41623 states. [2020-12-22 10:20:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41623 states to 41623 states and 60701 transitions. [2020-12-22 10:20:33,525 INFO L78 Accepts]: Start accepts. Automaton has 41623 states and 60701 transitions. Word has length 109 [2020-12-22 10:20:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:33,528 INFO L481 AbstractCegarLoop]: Abstraction has 41623 states and 60701 transitions. [2020-12-22 10:20:33,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:20:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41623 states and 60701 transitions. [2020-12-22 10:20:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:20:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:33,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:33,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:20:33,547 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash -237805515, now seen corresponding path program 1 times [2020-12-22 10:20:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:33,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417518759] [2020-12-22 10:20:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:33,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417518759] [2020-12-22 10:20:33,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:33,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:33,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317659728] [2020-12-22 10:20:33,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:33,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:33,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:33,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:33,784 INFO L87 Difference]: Start difference. First operand 41623 states and 60701 transitions. Second operand 4 states. [2020-12-22 10:20:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:44,053 INFO L93 Difference]: Finished difference Result 45417 states and 66806 transitions. [2020-12-22 10:20:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:20:44,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 10:20:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:44,117 INFO L225 Difference]: With dead ends: 45417 [2020-12-22 10:20:44,117 INFO L226 Difference]: Without dead ends: 43125 [2020-12-22 10:20:44,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43125 states. [2020-12-22 10:20:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43125 to 43125. [2020-12-22 10:20:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43125 states. [2020-12-22 10:20:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43125 states to 43125 states and 62286 transitions. [2020-12-22 10:20:46,876 INFO L78 Accepts]: Start accepts. Automaton has 43125 states and 62286 transitions. Word has length 132 [2020-12-22 10:20:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:46,877 INFO L481 AbstractCegarLoop]: Abstraction has 43125 states and 62286 transitions. [2020-12-22 10:20:46,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:20:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 43125 states and 62286 transitions. [2020-12-22 10:20:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:20:46,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:46,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:20:46,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:20:46,902 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1243757929, now seen corresponding path program 1 times [2020-12-22 10:20:46,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:46,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383277977] [2020-12-22 10:20:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 10:20:47,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383277977] [2020-12-22 10:20:47,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:47,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376009895] [2020-12-22 10:20:47,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:47,144 INFO L87 Difference]: Start difference. First operand 43125 states and 62286 transitions. Second operand 10 states. [2020-12-22 10:21:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:06,583 INFO L93 Difference]: Finished difference Result 365063 states and 530583 transitions. [2020-12-22 10:21:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:06,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:07,323 INFO L225 Difference]: With dead ends: 365063 [2020-12-22 10:21:07,323 INFO L226 Difference]: Without dead ends: 325765 [2020-12-22 10:21:07,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325765 states. [2020-12-22 10:21:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325765 to 82421. [2020-12-22 10:21:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82421 states. [2020-12-22 10:21:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82421 states to 82421 states and 119118 transitions. [2020-12-22 10:21:15,812 INFO L78 Accepts]: Start accepts. Automaton has 82421 states and 119118 transitions. Word has length 149 [2020-12-22 10:21:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:15,813 INFO L481 AbstractCegarLoop]: Abstraction has 82421 states and 119118 transitions. [2020-12-22 10:21:15,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 82421 states and 119118 transitions. [2020-12-22 10:21:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:15,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:15,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:15,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:21:15,861 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1273280147, now seen corresponding path program 1 times [2020-12-22 10:21:15,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:15,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251613522] [2020-12-22 10:21:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:21:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251613522] [2020-12-22 10:21:16,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:16,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852147191] [2020-12-22 10:21:16,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:16,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:16,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:16,125 INFO L87 Difference]: Start difference. First operand 82421 states and 119118 transitions. Second operand 10 states. [2020-12-22 10:21:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:40,364 INFO L93 Difference]: Finished difference Result 404359 states and 587415 transitions. [2020-12-22 10:21:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:40,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:21:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:40,978 INFO L225 Difference]: With dead ends: 404359 [2020-12-22 10:21:40,979 INFO L226 Difference]: Without dead ends: 365061 [2020-12-22 10:21:41,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:41,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365061 states. [2020-12-22 10:21:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365061 to 141429. [2020-12-22 10:21:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141429 states. [2020-12-22 10:21:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141429 states to 141429 states and 204046 transitions. [2020-12-22 10:21:54,418 INFO L78 Accepts]: Start accepts. Automaton has 141429 states and 204046 transitions. Word has length 149 [2020-12-22 10:21:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:54,432 INFO L481 AbstractCegarLoop]: Abstraction has 141429 states and 204046 transitions. [2020-12-22 10:21:54,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 141429 states and 204046 transitions. [2020-12-22 10:21:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 10:21:54,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:54,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:54,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:21:54,476 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1546967859, now seen corresponding path program 1 times [2020-12-22 10:21:54,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:54,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639630536] [2020-12-22 10:21:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:21:54,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639630536] [2020-12-22 10:21:54,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:54,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555719296] [2020-12-22 10:21:54,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:54,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:54,709 INFO L87 Difference]: Start difference. First operand 141429 states and 204046 transitions. Second operand 10 states. [2020-12-22 10:22:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:23,930 INFO L93 Difference]: Finished difference Result 443655 states and 644247 transitions. [2020-12-22 10:22:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:23,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 149 [2020-12-22 10:22:23,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:24,778 INFO L225 Difference]: With dead ends: 443655 [2020-12-22 10:22:24,779 INFO L226 Difference]: Without dead ends: 404357 [2020-12-22 10:22:24,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404357 states. [2020-12-22 10:22:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404357 to 180725. [2020-12-22 10:22:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180725 states.