/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:22:21,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:22:21,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:22:21,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:22:21,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:22:21,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:22:21,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:22:21,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:22:21,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:22:21,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:22:21,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:22:21,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:22:21,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:22:21,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:22:21,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:22:21,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:22:21,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:22:21,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:22:21,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:22:21,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:22:21,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:22:21,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:22:21,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:22:21,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:22:21,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:22:21,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:22:21,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:22:21,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:22:21,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:22:21,424 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:22:21,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:22:21,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:22:21,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:22:21,426 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:22:21,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:22:21,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:22:21,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:22:21,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:22:21,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:22:21,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:22:21,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:22:21,428 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:22:21,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:22:21,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:22:21,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:22:21,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:22:21,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:22:21,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:22:21,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:22:21,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:22:21,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:22:21,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:22:21,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:22:21,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:22:21,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:22:21,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:22:21,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:22:21,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:22:21,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:22:21,911 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:22:21,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:22:21,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dddb69e/971bd7c395bd4b589458ae7e6d47dbef/FLAG8b229bf1d [2020-12-22 07:22:22,831 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:22:22,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:22:22,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dddb69e/971bd7c395bd4b589458ae7e6d47dbef/FLAG8b229bf1d [2020-12-22 07:22:23,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17dddb69e/971bd7c395bd4b589458ae7e6d47dbef [2020-12-22 07:22:23,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:22:23,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:22:23,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:23,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:22:23,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:22:23,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e58f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23, skipping insertion in model container [2020-12-22 07:22:23,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:22:23,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:22:23,537 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2020-12-22 07:22:23,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:23,558 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:22:23,660 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2020-12-22 07:22:23,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:22:23,689 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:22:23,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23 WrapperNode [2020-12-22 07:22:23,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:22:23,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:23,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:22:23,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:22:23,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:22:23,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:22:23,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:22:23,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:22:23,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (1/1) ... [2020-12-22 07:22:23,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:22:23,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:22:23,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:22:23,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:22:23,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (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 07:22:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:22:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:22:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:22:24,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:22:25,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:22:25,556 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:22:25,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:25 BoogieIcfgContainer [2020-12-22 07:22:25,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:22:25,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:22:25,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:22:25,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:22:25,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:22:23" (1/3) ... [2020-12-22 07:22:25,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250fb9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:25, skipping insertion in model container [2020-12-22 07:22:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:22:23" (2/3) ... [2020-12-22 07:22:25,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250fb9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:22:25, skipping insertion in model container [2020-12-22 07:22:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:22:25" (3/3) ... [2020-12-22 07:22:25,569 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:22:25,577 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:22:25,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:22:25,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:22:25,639 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:22:25,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:22:25,639 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:22:25,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:22:25,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:22:25,640 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:22:25,640 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:22:25,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:22:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2020-12-22 07:22:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:25,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:25,684 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] [2020-12-22 07:22:25,684 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:25,692 INFO L82 PathProgramCache]: Analyzing trace with hash 883240596, now seen corresponding path program 1 times [2020-12-22 07:22:25,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:25,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553088421] [2020-12-22 07:22:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:26,183 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 07:22:26,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553088421] [2020-12-22 07:22:26,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:26,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:22:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919156291] [2020-12-22 07:22:26,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:22:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:22:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:22:26,209 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 2 states. [2020-12-22 07:22:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:26,259 INFO L93 Difference]: Finished difference Result 427 states and 757 transitions. [2020-12-22 07:22:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:22:26,262 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:22:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:26,301 INFO L225 Difference]: With dead ends: 427 [2020-12-22 07:22:26,301 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:22:26,305 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 07:22:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:22:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:22:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:22:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 550 transitions. [2020-12-22 07:22:26,380 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 550 transitions. Word has length 77 [2020-12-22 07:22:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:26,380 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 550 transitions. [2020-12-22 07:22:26,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:22:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 550 transitions. [2020-12-22 07:22:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:22:26,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:26,386 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] [2020-12-22 07:22:26,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:22:26,387 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash 749227090, now seen corresponding path program 1 times [2020-12-22 07:22:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:26,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138892098] [2020-12-22 07:22:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:26,655 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 07:22:26,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138892098] [2020-12-22 07:22:26,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:26,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:22:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776857087] [2020-12-22 07:22:26,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:22:26,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:22:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:26,662 INFO L87 Difference]: Start difference. First operand 307 states and 550 transitions. Second operand 5 states. [2020-12-22 07:22:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:26,846 INFO L93 Difference]: Finished difference Result 426 states and 750 transitions. [2020-12-22 07:22:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:22:26,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:22:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:26,854 INFO L225 Difference]: With dead ends: 426 [2020-12-22 07:22:26,855 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 07:22:26,859 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 07:22:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 07:22:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 07:22:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 07:22:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 508 transitions. [2020-12-22 07:22:26,886 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 508 transitions. Word has length 77 [2020-12-22 07:22:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:26,886 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 508 transitions. [2020-12-22 07:22:26,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:22:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 508 transitions. [2020-12-22 07:22:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:22:26,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:26,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:26,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:22:26,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1045938854, now seen corresponding path program 1 times [2020-12-22 07:22:26,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:26,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967407447] [2020-12-22 07:22:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,161 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 07:22:27,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967407447] [2020-12-22 07:22:27,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208721935] [2020-12-22 07:22:27,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,177 INFO L87 Difference]: Start difference. First operand 307 states and 508 transitions. Second operand 3 states. [2020-12-22 07:22:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,280 INFO L93 Difference]: Finished difference Result 526 states and 879 transitions. [2020-12-22 07:22:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:22:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,285 INFO L225 Difference]: With dead ends: 526 [2020-12-22 07:22:27,286 INFO L226 Difference]: Without dead ends: 411 [2020-12-22 07:22:27,287 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 07:22:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-22 07:22:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2020-12-22 07:22:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:22:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 675 transitions. [2020-12-22 07:22:27,307 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 675 transitions. Word has length 118 [2020-12-22 07:22:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,308 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 675 transitions. [2020-12-22 07:22:27,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 675 transitions. [2020-12-22 07:22:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:22:27,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:22:27,314 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1919052267, now seen corresponding path program 1 times [2020-12-22 07:22:27,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282209235] [2020-12-22 07:22:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,513 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 07:22:27,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282209235] [2020-12-22 07:22:27,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431208138] [2020-12-22 07:22:27,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,521 INFO L87 Difference]: Start difference. First operand 408 states and 675 transitions. Second operand 3 states. [2020-12-22 07:22:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,594 INFO L93 Difference]: Finished difference Result 822 states and 1367 transitions. [2020-12-22 07:22:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:22:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,607 INFO L225 Difference]: With dead ends: 822 [2020-12-22 07:22:27,608 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 07:22:27,612 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 07:22:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 07:22:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 602. [2020-12-22 07:22:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:22:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 997 transitions. [2020-12-22 07:22:27,662 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 997 transitions. Word has length 121 [2020-12-22 07:22:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:27,664 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 997 transitions. [2020-12-22 07:22:27,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 997 transitions. [2020-12-22 07:22:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:22:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:27,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:27,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:22:27,672 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1777448074, now seen corresponding path program 1 times [2020-12-22 07:22:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:27,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38207250] [2020-12-22 07:22:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:27,894 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 07:22:27,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38207250] [2020-12-22 07:22:27,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:27,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081659457] [2020-12-22 07:22:27,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:27,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:27,900 INFO L87 Difference]: Start difference. First operand 602 states and 997 transitions. Second operand 3 states. [2020-12-22 07:22:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:27,978 INFO L93 Difference]: Finished difference Result 1386 states and 2299 transitions. [2020-12-22 07:22:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:27,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:22:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:27,987 INFO L225 Difference]: With dead ends: 1386 [2020-12-22 07:22:27,987 INFO L226 Difference]: Without dead ends: 976 [2020-12-22 07:22:27,989 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 07:22:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-12-22 07:22:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 970. [2020-12-22 07:22:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-22 07:22:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1601 transitions. [2020-12-22 07:22:28,035 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1601 transitions. Word has length 124 [2020-12-22 07:22:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:28,036 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1601 transitions. [2020-12-22 07:22:28,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1601 transitions. [2020-12-22 07:22:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:22:28,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:28,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:28,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:22:28,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash 78545669, now seen corresponding path program 1 times [2020-12-22 07:22:28,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:28,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068735025] [2020-12-22 07:22:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:28,223 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 07:22:28,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068735025] [2020-12-22 07:22:28,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:28,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438255617] [2020-12-22 07:22:28,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:28,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:28,228 INFO L87 Difference]: Start difference. First operand 970 states and 1601 transitions. Second operand 3 states. [2020-12-22 07:22:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:28,315 INFO L93 Difference]: Finished difference Result 2454 states and 4043 transitions. [2020-12-22 07:22:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:28,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:22:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:28,328 INFO L225 Difference]: With dead ends: 2454 [2020-12-22 07:22:28,328 INFO L226 Difference]: Without dead ends: 1676 [2020-12-22 07:22:28,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2020-12-22 07:22:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1666. [2020-12-22 07:22:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1666 states. [2020-12-22 07:22:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2729 transitions. [2020-12-22 07:22:28,397 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2729 transitions. Word has length 127 [2020-12-22 07:22:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:28,398 INFO L481 AbstractCegarLoop]: Abstraction has 1666 states and 2729 transitions. [2020-12-22 07:22:28,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2729 transitions. [2020-12-22 07:22:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:22:28,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:28,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:28,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:22:28,402 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash -579836998, now seen corresponding path program 1 times [2020-12-22 07:22:28,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:28,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41549780] [2020-12-22 07:22:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:28,585 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 07:22:28,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41549780] [2020-12-22 07:22:28,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:28,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015585256] [2020-12-22 07:22:28,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:28,589 INFO L87 Difference]: Start difference. First operand 1666 states and 2729 transitions. Second operand 6 states. [2020-12-22 07:22:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:29,131 INFO L93 Difference]: Finished difference Result 8554 states and 14173 transitions. [2020-12-22 07:22:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:22:29,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:22:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:29,172 INFO L225 Difference]: With dead ends: 8554 [2020-12-22 07:22:29,172 INFO L226 Difference]: Without dead ends: 7080 [2020-12-22 07:22:29,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:22:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2020-12-22 07:22:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 3039. [2020-12-22 07:22:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-12-22 07:22:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4979 transitions. [2020-12-22 07:22:29,391 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4979 transitions. Word has length 130 [2020-12-22 07:22:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:29,392 INFO L481 AbstractCegarLoop]: Abstraction has 3039 states and 4979 transitions. [2020-12-22 07:22:29,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4979 transitions. [2020-12-22 07:22:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:22:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:29,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:29,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:22:29,397 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1405282905, now seen corresponding path program 1 times [2020-12-22 07:22:29,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:29,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472983098] [2020-12-22 07:22:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:22:29,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472983098] [2020-12-22 07:22:29,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:29,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037025836] [2020-12-22 07:22:29,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:29,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:29,696 INFO L87 Difference]: Start difference. First operand 3039 states and 4979 transitions. Second operand 4 states. [2020-12-22 07:22:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:29,966 INFO L93 Difference]: Finished difference Result 8943 states and 14761 transitions. [2020-12-22 07:22:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:29,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:22:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:30,001 INFO L225 Difference]: With dead ends: 8943 [2020-12-22 07:22:30,002 INFO L226 Difference]: Without dead ends: 6096 [2020-12-22 07:22:30,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 07:22:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2020-12-22 07:22:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 4509. [2020-12-22 07:22:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4509 states. [2020-12-22 07:22:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 7408 transitions. [2020-12-22 07:22:30,263 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 7408 transitions. Word has length 131 [2020-12-22 07:22:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:30,263 INFO L481 AbstractCegarLoop]: Abstraction has 4509 states and 7408 transitions. [2020-12-22 07:22:30,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 7408 transitions. [2020-12-22 07:22:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:22:30,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:30,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:30,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:22:30,268 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1311505199, now seen corresponding path program 1 times [2020-12-22 07:22:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:30,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318189372] [2020-12-22 07:22:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:30,378 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 07:22:30,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318189372] [2020-12-22 07:22:30,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:30,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877783005] [2020-12-22 07:22:30,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:30,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:30,388 INFO L87 Difference]: Start difference. First operand 4509 states and 7408 transitions. Second operand 4 states. [2020-12-22 07:22:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:30,827 INFO L93 Difference]: Finished difference Result 13196 states and 21768 transitions. [2020-12-22 07:22:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:30,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:22:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:30,903 INFO L225 Difference]: With dead ends: 13196 [2020-12-22 07:22:30,904 INFO L226 Difference]: Without dead ends: 8879 [2020-12-22 07:22:30,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:22:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8879 states. [2020-12-22 07:22:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8879 to 6670. [2020-12-22 07:22:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2020-12-22 07:22:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 10951 transitions. [2020-12-22 07:22:31,336 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 10951 transitions. Word has length 132 [2020-12-22 07:22:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:31,342 INFO L481 AbstractCegarLoop]: Abstraction has 6670 states and 10951 transitions. [2020-12-22 07:22:31,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 10951 transitions. [2020-12-22 07:22:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:31,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:31,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:31,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:22:31,348 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash -547474472, now seen corresponding path program 1 times [2020-12-22 07:22:31,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:31,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207944597] [2020-12-22 07:22:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:31,446 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 07:22:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207944597] [2020-12-22 07:22:31,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:31,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118387446] [2020-12-22 07:22:31,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:31,452 INFO L87 Difference]: Start difference. First operand 6670 states and 10951 transitions. Second operand 3 states. [2020-12-22 07:22:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:31,823 INFO L93 Difference]: Finished difference Result 14829 states and 24485 transitions. [2020-12-22 07:22:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:31,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:22:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:31,851 INFO L225 Difference]: With dead ends: 14829 [2020-12-22 07:22:31,851 INFO L226 Difference]: Without dead ends: 10255 [2020-12-22 07:22:31,858 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 07:22:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2020-12-22 07:22:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 10253. [2020-12-22 07:22:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10253 states. [2020-12-22 07:22:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 16819 transitions. [2020-12-22 07:22:32,312 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 16819 transitions. Word has length 133 [2020-12-22 07:22:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:32,313 INFO L481 AbstractCegarLoop]: Abstraction has 10253 states and 16819 transitions. [2020-12-22 07:22:32,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 16819 transitions. [2020-12-22 07:22:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:32,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:32,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:22:32,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1576389218, now seen corresponding path program 1 times [2020-12-22 07:22:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:32,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952556984] [2020-12-22 07:22:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:32,462 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 07:22:32,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952556984] [2020-12-22 07:22:32,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:32,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951583841] [2020-12-22 07:22:32,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:32,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:32,466 INFO L87 Difference]: Start difference. First operand 10253 states and 16819 transitions. Second operand 3 states. [2020-12-22 07:22:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:32,880 INFO L93 Difference]: Finished difference Result 22652 states and 37216 transitions. [2020-12-22 07:22:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:32,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:22:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:32,919 INFO L225 Difference]: With dead ends: 22652 [2020-12-22 07:22:32,920 INFO L226 Difference]: Without dead ends: 15630 [2020-12-22 07:22:32,933 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 07:22:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15630 states. [2020-12-22 07:22:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15630 to 15628. [2020-12-22 07:22:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15628 states. [2020-12-22 07:22:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15628 states to 15628 states and 25522 transitions. [2020-12-22 07:22:33,562 INFO L78 Accepts]: Start accepts. Automaton has 15628 states and 25522 transitions. Word has length 133 [2020-12-22 07:22:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:33,562 INFO L481 AbstractCegarLoop]: Abstraction has 15628 states and 25522 transitions. [2020-12-22 07:22:33,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 15628 states and 25522 transitions. [2020-12-22 07:22:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:33,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:33,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:33,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:22:33,565 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 721034008, now seen corresponding path program 1 times [2020-12-22 07:22:33,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:33,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830870652] [2020-12-22 07:22:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:33,735 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 07:22:33,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830870652] [2020-12-22 07:22:33,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:33,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:33,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40997597] [2020-12-22 07:22:33,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:33,738 INFO L87 Difference]: Start difference. First operand 15628 states and 25522 transitions. Second operand 3 states. [2020-12-22 07:22:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:34,413 INFO L93 Difference]: Finished difference Result 30486 states and 49905 transitions. [2020-12-22 07:22:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:34,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:22:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:34,474 INFO L225 Difference]: With dead ends: 30486 [2020-12-22 07:22:34,475 INFO L226 Difference]: Without dead ends: 21963 [2020-12-22 07:22:34,491 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 07:22:34,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21963 states. [2020-12-22 07:22:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21963 to 21961. [2020-12-22 07:22:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21961 states. [2020-12-22 07:22:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21961 states to 21961 states and 35721 transitions. [2020-12-22 07:22:35,660 INFO L78 Accepts]: Start accepts. Automaton has 21961 states and 35721 transitions. Word has length 133 [2020-12-22 07:22:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:35,660 INFO L481 AbstractCegarLoop]: Abstraction has 21961 states and 35721 transitions. [2020-12-22 07:22:35,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21961 states and 35721 transitions. [2020-12-22 07:22:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:35,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:35,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:35,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:22:35,663 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash 536413840, now seen corresponding path program 1 times [2020-12-22 07:22:35,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:35,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2736984] [2020-12-22 07:22:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:35,923 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 07:22:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2736984] [2020-12-22 07:22:35,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:35,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598241982] [2020-12-22 07:22:35,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:35,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:35,926 INFO L87 Difference]: Start difference. First operand 21961 states and 35721 transitions. Second operand 4 states. [2020-12-22 07:22:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:37,458 INFO L93 Difference]: Finished difference Result 70938 states and 115706 transitions. [2020-12-22 07:22:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:37,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:22:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:37,619 INFO L225 Difference]: With dead ends: 70938 [2020-12-22 07:22:37,619 INFO L226 Difference]: Without dead ends: 49197 [2020-12-22 07:22:37,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:22:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49197 states. [2020-12-22 07:22:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49197 to 35486. [2020-12-22 07:22:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35486 states. [2020-12-22 07:22:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 57573 transitions. [2020-12-22 07:22:39,300 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 57573 transitions. Word has length 133 [2020-12-22 07:22:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:39,300 INFO L481 AbstractCegarLoop]: Abstraction has 35486 states and 57573 transitions. [2020-12-22 07:22:39,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 57573 transitions. [2020-12-22 07:22:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:22:39,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:39,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:39,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:22:39,303 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1673295070, now seen corresponding path program 1 times [2020-12-22 07:22:39,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:39,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007879714] [2020-12-22 07:22:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:39,391 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 07:22:39,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007879714] [2020-12-22 07:22:39,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:39,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:22:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263185482] [2020-12-22 07:22:39,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:22:39,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:39,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:22:39,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:22:39,393 INFO L87 Difference]: Start difference. First operand 35486 states and 57573 transitions. Second operand 3 states. [2020-12-22 07:22:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:41,022 INFO L93 Difference]: Finished difference Result 69604 states and 113196 transitions. [2020-12-22 07:22:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:41,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 07:22:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:41,160 INFO L225 Difference]: With dead ends: 69604 [2020-12-22 07:22:41,160 INFO L226 Difference]: Without dead ends: 49801 [2020-12-22 07:22:41,186 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 07:22:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49801 states. [2020-12-22 07:22:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49801 to 49799. [2020-12-22 07:22:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49799 states. [2020-12-22 07:22:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49799 states to 49799 states and 80392 transitions. [2020-12-22 07:22:43,242 INFO L78 Accepts]: Start accepts. Automaton has 49799 states and 80392 transitions. Word has length 133 [2020-12-22 07:22:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:43,242 INFO L481 AbstractCegarLoop]: Abstraction has 49799 states and 80392 transitions. [2020-12-22 07:22:43,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 49799 states and 80392 transitions. [2020-12-22 07:22:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:22:43,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:43,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:43,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:22:43,245 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:43,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2138633752, now seen corresponding path program 1 times [2020-12-22 07:22:43,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:43,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488691719] [2020-12-22 07:22:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:43,345 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 07:22:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488691719] [2020-12-22 07:22:43,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:43,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338926692] [2020-12-22 07:22:43,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:43,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:43,348 INFO L87 Difference]: Start difference. First operand 49799 states and 80392 transitions. Second operand 4 states. [2020-12-22 07:22:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:45,983 INFO L93 Difference]: Finished difference Result 160333 states and 259541 transitions. [2020-12-22 07:22:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:45,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:22:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:46,362 INFO L225 Difference]: With dead ends: 160333 [2020-12-22 07:22:46,363 INFO L226 Difference]: Without dead ends: 110767 [2020-12-22 07:22:46,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:22:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110767 states. [2020-12-22 07:22:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110767 to 80058. [2020-12-22 07:22:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:22:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128840 transitions. [2020-12-22 07:22:49,382 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128840 transitions. Word has length 134 [2020-12-22 07:22:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:49,382 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128840 transitions. [2020-12-22 07:22:49,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:22:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128840 transitions. [2020-12-22 07:22:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:22:49,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:49,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:49,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:22:49,385 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -153851200, now seen corresponding path program 1 times [2020-12-22 07:22:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:49,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300310331] [2020-12-22 07:22:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:49,610 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 07:22:49,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300310331] [2020-12-22 07:22:49,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:49,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:22:49,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898365824] [2020-12-22 07:22:49,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:22:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:22:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:22:49,613 INFO L87 Difference]: Start difference. First operand 80058 states and 128840 transitions. Second operand 6 states. [2020-12-22 07:22:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:51,965 INFO L93 Difference]: Finished difference Result 159885 states and 257310 transitions. [2020-12-22 07:22:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:22:51,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:22:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:52,123 INFO L225 Difference]: With dead ends: 159885 [2020-12-22 07:22:52,123 INFO L226 Difference]: Without dead ends: 80060 [2020-12-22 07:22:52,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:22:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80060 states. [2020-12-22 07:22:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80060 to 80058. [2020-12-22 07:22:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80058 states. [2020-12-22 07:22:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80058 states to 80058 states and 128215 transitions. [2020-12-22 07:22:54,902 INFO L78 Accepts]: Start accepts. Automaton has 80058 states and 128215 transitions. Word has length 136 [2020-12-22 07:22:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:54,902 INFO L481 AbstractCegarLoop]: Abstraction has 80058 states and 128215 transitions. [2020-12-22 07:22:54,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:22:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 80058 states and 128215 transitions. [2020-12-22 07:22:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:22:54,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:54,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:54,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:22:54,904 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1698314093, now seen corresponding path program 1 times [2020-12-22 07:22:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:54,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59340696] [2020-12-22 07:22:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:55,245 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 07:22:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59340696] [2020-12-22 07:22:55,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:55,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997289432] [2020-12-22 07:22:55,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:55,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:55,249 INFO L87 Difference]: Start difference. First operand 80058 states and 128215 transitions. Second operand 4 states. [2020-12-22 07:22:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:59,109 INFO L93 Difference]: Finished difference Result 238287 states and 381573 transitions. [2020-12-22 07:22:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:22:59,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:22:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:59,563 INFO L225 Difference]: With dead ends: 238287 [2020-12-22 07:22:59,563 INFO L226 Difference]: Without dead ends: 158240 [2020-12-22 07:22:59,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:22:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158240 states. [2020-12-22 07:23:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158240 to 158238. [2020-12-22 07:23:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158238 states. [2020-12-22 07:23:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158238 states to 158238 states and 252200 transitions. [2020-12-22 07:23:04,729 INFO L78 Accepts]: Start accepts. Automaton has 158238 states and 252200 transitions. Word has length 139 [2020-12-22 07:23:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:04,730 INFO L481 AbstractCegarLoop]: Abstraction has 158238 states and 252200 transitions. [2020-12-22 07:23:04,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 158238 states and 252200 transitions. [2020-12-22 07:23:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:23:04,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:04,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:04,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:23:04,732 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1498816216, now seen corresponding path program 1 times [2020-12-22 07:23:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:04,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742207833] [2020-12-22 07:23:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:04,924 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 07:23:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742207833] [2020-12-22 07:23:04,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:04,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:04,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425170269] [2020-12-22 07:23:04,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:04,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:04,926 INFO L87 Difference]: Start difference. First operand 158238 states and 252200 transitions. Second operand 4 states. [2020-12-22 07:23:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:12,818 INFO L93 Difference]: Finished difference Result 470952 states and 750479 transitions. [2020-12-22 07:23:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:12,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:23:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:13,710 INFO L225 Difference]: With dead ends: 470952 [2020-12-22 07:23:13,710 INFO L226 Difference]: Without dead ends: 312726 [2020-12-22 07:23:13,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312726 states. [2020-12-22 07:23:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312726 to 312724. [2020-12-22 07:23:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312724 states. [2020-12-22 07:23:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312724 states to 312724 states and 495946 transitions. [2020-12-22 07:23:24,224 INFO L78 Accepts]: Start accepts. Automaton has 312724 states and 495946 transitions. Word has length 141 [2020-12-22 07:23:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:24,229 INFO L481 AbstractCegarLoop]: Abstraction has 312724 states and 495946 transitions. [2020-12-22 07:23:24,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 312724 states and 495946 transitions. [2020-12-22 07:23:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:23:24,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:24,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:24,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:23:24,235 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash -200929965, now seen corresponding path program 1 times [2020-12-22 07:23:24,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:24,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602770037] [2020-12-22 07:23:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:24,470 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 07:23:24,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602770037] [2020-12-22 07:23:24,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:24,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505706107] [2020-12-22 07:23:24,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:24,474 INFO L87 Difference]: Start difference. First operand 312724 states and 495946 transitions. Second operand 4 states. [2020-12-22 07:23:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:41,863 INFO L93 Difference]: Finished difference Result 930649 states and 1475599 transitions. [2020-12-22 07:23:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:41,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:23:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:43,323 INFO L225 Difference]: With dead ends: 930649 [2020-12-22 07:23:43,324 INFO L226 Difference]: Without dead ends: 617952 [2020-12-22 07:23:44,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:44,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617952 states. [2020-12-22 07:24:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617952 to 617950. [2020-12-22 07:24:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617950 states. [2020-12-22 07:24:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617950 states to 617950 states and 974995 transitions. [2020-12-22 07:24:11,092 INFO L78 Accepts]: Start accepts. Automaton has 617950 states and 974995 transitions. Word has length 143 [2020-12-22 07:24:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:11,096 INFO L481 AbstractCegarLoop]: Abstraction has 617950 states and 974995 transitions. [2020-12-22 07:24:11,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 617950 states and 974995 transitions. [2020-12-22 07:24:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:24:11,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:11,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:24:11,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:24:11,103 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1235528920, now seen corresponding path program 1 times [2020-12-22 07:24:11,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:11,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828168513] [2020-12-22 07:24:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:11,415 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 07:24:11,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828168513] [2020-12-22 07:24:11,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:11,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829247657] [2020-12-22 07:24:11,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:11,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:11,417 INFO L87 Difference]: Start difference. First operand 617950 states and 974995 transitions. Second operand 4 states. [2020-12-22 07:24:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:55,399 INFO L93 Difference]: Finished difference Result 1838642 states and 2900233 transitions. [2020-12-22 07:24:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:55,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:24:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:59,321 INFO L225 Difference]: With dead ends: 1838642 [2020-12-22 07:24:59,321 INFO L226 Difference]: Without dead ends: 1220828 [2020-12-22 07:25:00,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220828 states.