/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/systemc/token_ring.06.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:09:02,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:09:02,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:09:02,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:09:02,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:09:02,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:09:02,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:09:02,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:09:02,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:09:02,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:09:02,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:09:02,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:09:02,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:09:02,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:09:02,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:09:02,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:09:02,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:09:02,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:09:02,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:09:02,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:09:02,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:09:02,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:09:02,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:09:02,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:09:02,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:09:02,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:09:02,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:09:02,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:09:02,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:09:02,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:09:02,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:09:02,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:09:02,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:09:02,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:09:02,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:09:02,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:09:02,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:09:02,381 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:09:02,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:09:02,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:09:02,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:09:02,386 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:09:02,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:09:02,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:09:02,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:09:02,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:09:02,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:09:02,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:09:02,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:09:02,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:09:02,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:09:02,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:09:02,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:09:02,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:09:02,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:09:02,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:09:02,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:09:02,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:09:02,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:09:02,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:09:02,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:09:02,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:09:02,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:09:02,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:09:02,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:09:02,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:09:02,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:09:02,812 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:09:02,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.06.cil-2.c [2020-12-22 07:09:02,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1348da9/d00f816896414c7cafc6b61b905806ce/FLAGb0aca75a2 [2020-12-22 07:09:03,624 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:09:03,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.06.cil-2.c [2020-12-22 07:09:03,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1348da9/d00f816896414c7cafc6b61b905806ce/FLAGb0aca75a2 [2020-12-22 07:09:03,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1348da9/d00f816896414c7cafc6b61b905806ce [2020-12-22 07:09:03,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:09:03,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:09:03,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:03,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:09:03,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:09:03,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c8f0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03, skipping insertion in model container [2020-12-22 07:09:03,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:09:03,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:09:04,120 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/systemc/token_ring.06.cil-2.c[366,379] [2020-12-22 07:09:04,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:04,290 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:09:04,312 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/systemc/token_ring.06.cil-2.c[366,379] [2020-12-22 07:09:04,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:04,455 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:09:04,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04 WrapperNode [2020-12-22 07:09:04,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:04,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:04,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:09:04,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:09:04,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:04,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:09:04,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:09:04,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:09:04,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (1/1) ... [2020-12-22 07:09:04,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:09:04,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:09:04,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:09:04,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:09:04,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (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 07:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:09:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:09:06,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:09:06,363 INFO L299 CfgBuilder]: Removed 235 assume(true) statements. [2020-12-22 07:09:06,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:06 BoogieIcfgContainer [2020-12-22 07:09:06,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:09:06,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:09:06,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:09:06,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:09:06,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:09:03" (1/3) ... [2020-12-22 07:09:06,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545a842b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:06, skipping insertion in model container [2020-12-22 07:09:06,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:04" (2/3) ... [2020-12-22 07:09:06,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545a842b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:06, skipping insertion in model container [2020-12-22 07:09:06,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:06" (3/3) ... [2020-12-22 07:09:06,377 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-2.c [2020-12-22 07:09:06,383 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:09:06,388 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:09:06,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:09:06,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:09:06,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:09:06,438 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:09:06,438 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:09:06,438 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:09:06,438 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:09:06,438 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:09:06,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:09:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states. [2020-12-22 07:09:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:06,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:06,479 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] [2020-12-22 07:09:06,479 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1352099133, now seen corresponding path program 1 times [2020-12-22 07:09:06,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:06,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717668204] [2020-12-22 07:09:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:06,724 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 07:09:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717668204] [2020-12-22 07:09:06,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:06,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:06,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647104319] [2020-12-22 07:09:06,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:06,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:06,748 INFO L87 Difference]: Start difference. First operand 666 states. Second operand 3 states. [2020-12-22 07:09:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:06,856 INFO L93 Difference]: Finished difference Result 1327 states and 2041 transitions. [2020-12-22 07:09:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:06,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:06,897 INFO L225 Difference]: With dead ends: 1327 [2020-12-22 07:09:06,902 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 07:09:06,912 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 07:09:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 07:09:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2020-12-22 07:09:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-12-22 07:09:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1000 transitions. [2020-12-22 07:09:07,082 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1000 transitions. Word has length 94 [2020-12-22 07:09:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,083 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 1000 transitions. [2020-12-22 07:09:07,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1000 transitions. [2020-12-22 07:09:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,092 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] [2020-12-22 07:09:07,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:09:07,092 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash -524964097, now seen corresponding path program 1 times [2020-12-22 07:09:07,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458036867] [2020-12-22 07:09:07,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,224 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 07:09:07,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458036867] [2020-12-22 07:09:07,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:07,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472641338] [2020-12-22 07:09:07,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:07,228 INFO L87 Difference]: Start difference. First operand 662 states and 1000 transitions. Second operand 3 states. [2020-12-22 07:09:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,299 INFO L93 Difference]: Finished difference Result 1838 states and 2768 transitions. [2020-12-22 07:09:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:07,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,307 INFO L225 Difference]: With dead ends: 1838 [2020-12-22 07:09:07,307 INFO L226 Difference]: Without dead ends: 1187 [2020-12-22 07:09:07,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:09:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2020-12-22 07:09:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1185. [2020-12-22 07:09:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1781 transitions. [2020-12-22 07:09:07,354 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1781 transitions. Word has length 94 [2020-12-22 07:09:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,354 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1781 transitions. [2020-12-22 07:09:07,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1781 transitions. [2020-12-22 07:09:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,357 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] [2020-12-22 07:09:07,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:09:07,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1381399163, now seen corresponding path program 1 times [2020-12-22 07:09:07,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298149819] [2020-12-22 07:09:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,434 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 07:09:07,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298149819] [2020-12-22 07:09:07,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:07,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780174056] [2020-12-22 07:09:07,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:07,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:07,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:07,437 INFO L87 Difference]: Start difference. First operand 1185 states and 1781 transitions. Second operand 4 states. [2020-12-22 07:09:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,559 INFO L93 Difference]: Finished difference Result 2882 states and 4325 transitions. [2020-12-22 07:09:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:07,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,568 INFO L225 Difference]: With dead ends: 2882 [2020-12-22 07:09:07,569 INFO L226 Difference]: Without dead ends: 1709 [2020-12-22 07:09:07,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2020-12-22 07:09:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1185. [2020-12-22 07:09:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1778 transitions. [2020-12-22 07:09:07,625 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1778 transitions. Word has length 94 [2020-12-22 07:09:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,626 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1778 transitions. [2020-12-22 07:09:07,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1778 transitions. [2020-12-22 07:09:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,628 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] [2020-12-22 07:09:07,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:09:07,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1588711939, now seen corresponding path program 1 times [2020-12-22 07:09:07,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463128950] [2020-12-22 07:09:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,731 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 07:09:07,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463128950] [2020-12-22 07:09:07,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978465647] [2020-12-22 07:09:07,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:07,733 INFO L87 Difference]: Start difference. First operand 1185 states and 1778 transitions. Second operand 4 states. [2020-12-22 07:09:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,875 INFO L93 Difference]: Finished difference Result 2878 states and 4311 transitions. [2020-12-22 07:09:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:07,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,884 INFO L225 Difference]: With dead ends: 2878 [2020-12-22 07:09:07,884 INFO L226 Difference]: Without dead ends: 1707 [2020-12-22 07:09:07,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-22 07:09:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1185. [2020-12-22 07:09:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1775 transitions. [2020-12-22 07:09:07,952 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1775 transitions. Word has length 94 [2020-12-22 07:09:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,952 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1775 transitions. [2020-12-22 07:09:07,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1775 transitions. [2020-12-22 07:09:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,954 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] [2020-12-22 07:09:07,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:09:07,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1648417279, now seen corresponding path program 1 times [2020-12-22 07:09:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907078285] [2020-12-22 07:09:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,014 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 07:09:08,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907078285] [2020-12-22 07:09:08,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:08,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257996309] [2020-12-22 07:09:08,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:08,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:08,019 INFO L87 Difference]: Start difference. First operand 1185 states and 1775 transitions. Second operand 3 states. [2020-12-22 07:09:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,102 INFO L93 Difference]: Finished difference Result 2355 states and 3527 transitions. [2020-12-22 07:09:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:08,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:08,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,110 INFO L225 Difference]: With dead ends: 2355 [2020-12-22 07:09:08,110 INFO L226 Difference]: Without dead ends: 1185 [2020-12-22 07:09:08,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:09:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2020-12-22 07:09:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2020-12-22 07:09:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1767 transitions. [2020-12-22 07:09:08,186 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1767 transitions. Word has length 94 [2020-12-22 07:09:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,187 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1767 transitions. [2020-12-22 07:09:08,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1767 transitions. [2020-12-22 07:09:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,188 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] [2020-12-22 07:09:08,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:09:08,189 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 371901307, now seen corresponding path program 1 times [2020-12-22 07:09:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559092053] [2020-12-22 07:09:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,300 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 07:09:08,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559092053] [2020-12-22 07:09:08,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411493956] [2020-12-22 07:09:08,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:08,307 INFO L87 Difference]: Start difference. First operand 1185 states and 1767 transitions. Second operand 3 states. [2020-12-22 07:09:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,388 INFO L93 Difference]: Finished difference Result 2354 states and 3510 transitions. [2020-12-22 07:09:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:08,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,395 INFO L225 Difference]: With dead ends: 2354 [2020-12-22 07:09:08,395 INFO L226 Difference]: Without dead ends: 1185 [2020-12-22 07:09:08,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:09:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2020-12-22 07:09:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2020-12-22 07:09:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1759 transitions. [2020-12-22 07:09:08,459 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1759 transitions. Word has length 94 [2020-12-22 07:09:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,460 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1759 transitions. [2020-12-22 07:09:08,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1759 transitions. [2020-12-22 07:09:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,461 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] [2020-12-22 07:09:08,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:09:08,462 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1193297281, now seen corresponding path program 1 times [2020-12-22 07:09:08,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253040788] [2020-12-22 07:09:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,564 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 07:09:08,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253040788] [2020-12-22 07:09:08,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:08,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255024965] [2020-12-22 07:09:08,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:08,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:08,570 INFO L87 Difference]: Start difference. First operand 1185 states and 1759 transitions. Second operand 4 states. [2020-12-22 07:09:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,734 INFO L93 Difference]: Finished difference Result 2872 states and 4259 transitions. [2020-12-22 07:09:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:08,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,743 INFO L225 Difference]: With dead ends: 2872 [2020-12-22 07:09:08,743 INFO L226 Difference]: Without dead ends: 1704 [2020-12-22 07:09:08,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2020-12-22 07:09:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1185. [2020-12-22 07:09:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1756 transitions. [2020-12-22 07:09:08,843 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1756 transitions. Word has length 94 [2020-12-22 07:09:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,843 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1756 transitions. [2020-12-22 07:09:08,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1756 transitions. [2020-12-22 07:09:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,846 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] [2020-12-22 07:09:08,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:09:08,846 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash -354263619, now seen corresponding path program 1 times [2020-12-22 07:09:08,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085224500] [2020-12-22 07:09:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,923 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 07:09:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085224500] [2020-12-22 07:09:08,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108258799] [2020-12-22 07:09:08,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:08,926 INFO L87 Difference]: Start difference. First operand 1185 states and 1756 transitions. Second operand 4 states. [2020-12-22 07:09:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:09,120 INFO L93 Difference]: Finished difference Result 2821 states and 4179 transitions. [2020-12-22 07:09:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:09,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:09,129 INFO L225 Difference]: With dead ends: 2821 [2020-12-22 07:09:09,129 INFO L226 Difference]: Without dead ends: 1654 [2020-12-22 07:09:09,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:09,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2020-12-22 07:09:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1185. [2020-12-22 07:09:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1753 transitions. [2020-12-22 07:09:09,204 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1753 transitions. Word has length 94 [2020-12-22 07:09:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:09,204 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1753 transitions. [2020-12-22 07:09:09,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1753 transitions. [2020-12-22 07:09:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:09,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:09,206 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] [2020-12-22 07:09:09,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:09:09,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash -327198017, now seen corresponding path program 1 times [2020-12-22 07:09:09,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:09,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33696641] [2020-12-22 07:09:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:09,291 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 07:09:09,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33696641] [2020-12-22 07:09:09,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:09,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:09,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366297786] [2020-12-22 07:09:09,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:09,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:09,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:09,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:09,301 INFO L87 Difference]: Start difference. First operand 1185 states and 1753 transitions. Second operand 4 states. [2020-12-22 07:09:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:09,508 INFO L93 Difference]: Finished difference Result 2819 states and 4169 transitions. [2020-12-22 07:09:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:09,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:09,516 INFO L225 Difference]: With dead ends: 2819 [2020-12-22 07:09:09,516 INFO L226 Difference]: Without dead ends: 1653 [2020-12-22 07:09:09,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2020-12-22 07:09:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1185. [2020-12-22 07:09:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1750 transitions. [2020-12-22 07:09:09,612 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1750 transitions. Word has length 94 [2020-12-22 07:09:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:09,614 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1750 transitions. [2020-12-22 07:09:09,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1750 transitions. [2020-12-22 07:09:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:09,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:09,615 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] [2020-12-22 07:09:09,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:09:09,615 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1890432381, now seen corresponding path program 1 times [2020-12-22 07:09:09,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:09,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926122478] [2020-12-22 07:09:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:09,664 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 07:09:09,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926122478] [2020-12-22 07:09:09,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:09,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:09,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006414220] [2020-12-22 07:09:09,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:09,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:09,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:09,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:09,668 INFO L87 Difference]: Start difference. First operand 1185 states and 1750 transitions. Second operand 3 states. [2020-12-22 07:09:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:09,777 INFO L93 Difference]: Finished difference Result 2350 states and 3472 transitions. [2020-12-22 07:09:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:09,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:09,786 INFO L225 Difference]: With dead ends: 2350 [2020-12-22 07:09:09,786 INFO L226 Difference]: Without dead ends: 1185 [2020-12-22 07:09:09,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:09:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2020-12-22 07:09:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1185. [2020-12-22 07:09:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1726 transitions. [2020-12-22 07:09:09,871 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1726 transitions. Word has length 94 [2020-12-22 07:09:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:09,872 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1726 transitions. [2020-12-22 07:09:09,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1726 transitions. [2020-12-22 07:09:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:09,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:09,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:09,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:09:09,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2119106878, now seen corresponding path program 1 times [2020-12-22 07:09:09,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:09,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742355764] [2020-12-22 07:09:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:09,924 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 07:09:09,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742355764] [2020-12-22 07:09:09,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:09,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887949651] [2020-12-22 07:09:09,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:09,928 INFO L87 Difference]: Start difference. First operand 1185 states and 1726 transitions. Second operand 4 states. [2020-12-22 07:09:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,145 INFO L93 Difference]: Finished difference Result 2813 states and 4096 transitions. [2020-12-22 07:09:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:10,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,155 INFO L225 Difference]: With dead ends: 2813 [2020-12-22 07:09:10,155 INFO L226 Difference]: Without dead ends: 1650 [2020-12-22 07:09:10,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2020-12-22 07:09:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1185. [2020-12-22 07:09:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1723 transitions. [2020-12-22 07:09:10,236 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1723 transitions. Word has length 94 [2020-12-22 07:09:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:10,236 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1723 transitions. [2020-12-22 07:09:10,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1723 transitions. [2020-12-22 07:09:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:10,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,237 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] [2020-12-22 07:09:10,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:09:10,238 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 264817860, now seen corresponding path program 1 times [2020-12-22 07:09:10,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537641863] [2020-12-22 07:09:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,295 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 07:09:10,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537641863] [2020-12-22 07:09:10,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:10,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438284081] [2020-12-22 07:09:10,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:10,298 INFO L87 Difference]: Start difference. First operand 1185 states and 1723 transitions. Second operand 4 states. [2020-12-22 07:09:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,513 INFO L93 Difference]: Finished difference Result 2811 states and 4086 transitions. [2020-12-22 07:09:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:10,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,521 INFO L225 Difference]: With dead ends: 2811 [2020-12-22 07:09:10,521 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 07:09:10,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 07:09:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1185. [2020-12-22 07:09:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1720 transitions. [2020-12-22 07:09:10,604 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1720 transitions. Word has length 94 [2020-12-22 07:09:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:10,604 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1720 transitions. [2020-12-22 07:09:10,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1720 transitions. [2020-12-22 07:09:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:10,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,606 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] [2020-12-22 07:09:10,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:09:10,606 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash 341718658, now seen corresponding path program 1 times [2020-12-22 07:09:10,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482206713] [2020-12-22 07:09:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,648 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 07:09:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482206713] [2020-12-22 07:09:10,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506827249] [2020-12-22 07:09:10,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:10,651 INFO L87 Difference]: Start difference. First operand 1185 states and 1720 transitions. Second operand 4 states. [2020-12-22 07:09:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,906 INFO L93 Difference]: Finished difference Result 2809 states and 4076 transitions. [2020-12-22 07:09:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:10,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,917 INFO L225 Difference]: With dead ends: 2809 [2020-12-22 07:09:10,917 INFO L226 Difference]: Without dead ends: 1648 [2020-12-22 07:09:10,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2020-12-22 07:09:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1185. [2020-12-22 07:09:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1185 states. [2020-12-22 07:09:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1717 transitions. [2020-12-22 07:09:11,016 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1717 transitions. Word has length 94 [2020-12-22 07:09:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,017 INFO L481 AbstractCegarLoop]: Abstraction has 1185 states and 1717 transitions. [2020-12-22 07:09:11,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1717 transitions. [2020-12-22 07:09:11,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:11,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,018 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] [2020-12-22 07:09:11,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:09:11,018 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash -625631996, now seen corresponding path program 1 times [2020-12-22 07:09:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25376190] [2020-12-22 07:09:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25376190] [2020-12-22 07:09:11,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:11,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828652861] [2020-12-22 07:09:11,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:11,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:11,079 INFO L87 Difference]: Start difference. First operand 1185 states and 1717 transitions. Second operand 5 states. [2020-12-22 07:09:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:11,495 INFO L93 Difference]: Finished difference Result 4497 states and 6508 transitions. [2020-12-22 07:09:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:11,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-12-22 07:09:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:11,513 INFO L225 Difference]: With dead ends: 4497 [2020-12-22 07:09:11,513 INFO L226 Difference]: Without dead ends: 3343 [2020-12-22 07:09:11,517 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 07:09:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2020-12-22 07:09:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 1239. [2020-12-22 07:09:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1239 states. [2020-12-22 07:09:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1771 transitions. [2020-12-22 07:09:11,626 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1771 transitions. Word has length 94 [2020-12-22 07:09:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,626 INFO L481 AbstractCegarLoop]: Abstraction has 1239 states and 1771 transitions. [2020-12-22 07:09:11,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1771 transitions. [2020-12-22 07:09:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:11,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,628 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] [2020-12-22 07:09:11,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:09:11,628 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1983155462, now seen corresponding path program 1 times [2020-12-22 07:09:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505704435] [2020-12-22 07:09:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,690 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 07:09:11,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505704435] [2020-12-22 07:09:11,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:11,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005308175] [2020-12-22 07:09:11,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:11,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:11,692 INFO L87 Difference]: Start difference. First operand 1239 states and 1771 transitions. Second operand 4 states. [2020-12-22 07:09:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:12,295 INFO L93 Difference]: Finished difference Result 4519 states and 6446 transitions. [2020-12-22 07:09:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:12,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:12,337 INFO L225 Difference]: With dead ends: 4519 [2020-12-22 07:09:12,337 INFO L226 Difference]: Without dead ends: 3306 [2020-12-22 07:09:12,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2020-12-22 07:09:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3120. [2020-12-22 07:09:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3120 states. [2020-12-22 07:09:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4408 transitions. [2020-12-22 07:09:12,662 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4408 transitions. Word has length 94 [2020-12-22 07:09:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:12,663 INFO L481 AbstractCegarLoop]: Abstraction has 3120 states and 4408 transitions. [2020-12-22 07:09:12,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4408 transitions. [2020-12-22 07:09:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:12,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:12,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:12,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:09:12,666 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:12,666 INFO L82 PathProgramCache]: Analyzing trace with hash 353335840, now seen corresponding path program 1 times [2020-12-22 07:09:12,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:12,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952348464] [2020-12-22 07:09:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:12,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952348464] [2020-12-22 07:09:12,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:12,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:12,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854997096] [2020-12-22 07:09:12,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:12,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:12,729 INFO L87 Difference]: Start difference. First operand 3120 states and 4408 transitions. Second operand 5 states. [2020-12-22 07:09:13,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:13,376 INFO L93 Difference]: Finished difference Result 8179 states and 11598 transitions. [2020-12-22 07:09:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:13,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 07:09:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:13,404 INFO L225 Difference]: With dead ends: 8179 [2020-12-22 07:09:13,404 INFO L226 Difference]: Without dead ends: 5095 [2020-12-22 07:09:13,411 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 07:09:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2020-12-22 07:09:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 3171. [2020-12-22 07:09:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3171 states. [2020-12-22 07:09:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 4430 transitions. [2020-12-22 07:09:13,720 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 4430 transitions. Word has length 111 [2020-12-22 07:09:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:13,721 INFO L481 AbstractCegarLoop]: Abstraction has 3171 states and 4430 transitions. [2020-12-22 07:09:13,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 4430 transitions. [2020-12-22 07:09:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:13,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:13,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:13,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:09:13,723 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1724001058, now seen corresponding path program 1 times [2020-12-22 07:09:13,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:13,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38962848] [2020-12-22 07:09:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:13,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38962848] [2020-12-22 07:09:13,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:13,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:13,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889441104] [2020-12-22 07:09:13,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:13,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:13,805 INFO L87 Difference]: Start difference. First operand 3171 states and 4430 transitions. Second operand 5 states. [2020-12-22 07:09:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:14,284 INFO L93 Difference]: Finished difference Result 7127 states and 9937 transitions. [2020-12-22 07:09:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:14,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 07:09:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:14,292 INFO L225 Difference]: With dead ends: 7127 [2020-12-22 07:09:14,293 INFO L226 Difference]: Without dead ends: 3999 [2020-12-22 07:09:14,299 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 07:09:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2020-12-22 07:09:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3177. [2020-12-22 07:09:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3177 states. [2020-12-22 07:09:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4392 transitions. [2020-12-22 07:09:14,627 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4392 transitions. Word has length 111 [2020-12-22 07:09:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:14,628 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 4392 transitions. [2020-12-22 07:09:14,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4392 transitions. [2020-12-22 07:09:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:14,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:14,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:14,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:09:14,630 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 184456732, now seen corresponding path program 1 times [2020-12-22 07:09:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:14,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589543515] [2020-12-22 07:09:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589543515] [2020-12-22 07:09:14,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:14,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:14,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864765372] [2020-12-22 07:09:14,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:14,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:14,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:14,680 INFO L87 Difference]: Start difference. First operand 3177 states and 4392 transitions. Second operand 4 states. [2020-12-22 07:09:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:15,591 INFO L93 Difference]: Finished difference Result 11779 states and 16276 transitions. [2020-12-22 07:09:15,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:15,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 07:09:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:15,611 INFO L225 Difference]: With dead ends: 11779 [2020-12-22 07:09:15,611 INFO L226 Difference]: Without dead ends: 8654 [2020-12-22 07:09:15,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2020-12-22 07:09:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 8294. [2020-12-22 07:09:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8294 states. [2020-12-22 07:09:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 11365 transitions. [2020-12-22 07:09:16,455 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 11365 transitions. Word has length 111 [2020-12-22 07:09:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:16,455 INFO L481 AbstractCegarLoop]: Abstraction has 8294 states and 11365 transitions. [2020-12-22 07:09:16,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 11365 transitions. [2020-12-22 07:09:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:16,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:16,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:16,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:09:16,459 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:16,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1492111514, now seen corresponding path program 1 times [2020-12-22 07:09:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:16,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483546807] [2020-12-22 07:09:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483546807] [2020-12-22 07:09:16,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:16,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:16,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841736409] [2020-12-22 07:09:16,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:16,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:16,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:16,511 INFO L87 Difference]: Start difference. First operand 8294 states and 11365 transitions. Second operand 5 states. [2020-12-22 07:09:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:17,668 INFO L93 Difference]: Finished difference Result 20937 states and 28878 transitions. [2020-12-22 07:09:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:17,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:17,751 INFO L225 Difference]: With dead ends: 20937 [2020-12-22 07:09:17,751 INFO L226 Difference]: Without dead ends: 12699 [2020-12-22 07:09:17,761 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 07:09:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12699 states. [2020-12-22 07:09:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12699 to 8429. [2020-12-22 07:09:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8429 states. [2020-12-22 07:09:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 11425 transitions. [2020-12-22 07:09:18,742 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 11425 transitions. Word has length 115 [2020-12-22 07:09:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:18,743 INFO L481 AbstractCegarLoop]: Abstraction has 8429 states and 11425 transitions. [2020-12-22 07:09:18,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 11425 transitions. [2020-12-22 07:09:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:18,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:18,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:18,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:09:18,748 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2123583528, now seen corresponding path program 1 times [2020-12-22 07:09:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:18,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685971168] [2020-12-22 07:09:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:18,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685971168] [2020-12-22 07:09:18,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:18,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100758486] [2020-12-22 07:09:18,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:18,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:18,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:18,821 INFO L87 Difference]: Start difference. First operand 8429 states and 11425 transitions. Second operand 5 states. [2020-12-22 07:09:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:20,773 INFO L93 Difference]: Finished difference Result 28027 states and 38434 transitions. [2020-12-22 07:09:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:20,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:20,809 INFO L225 Difference]: With dead ends: 28027 [2020-12-22 07:09:20,809 INFO L226 Difference]: Without dead ends: 19661 [2020-12-22 07:09:20,821 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 07:09:20,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19661 states. [2020-12-22 07:09:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19661 to 8789. [2020-12-22 07:09:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8789 states. [2020-12-22 07:09:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 11785 transitions. [2020-12-22 07:09:21,632 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 11785 transitions. Word has length 115 [2020-12-22 07:09:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:21,633 INFO L481 AbstractCegarLoop]: Abstraction has 8789 states and 11785 transitions. [2020-12-22 07:09:21,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 11785 transitions. [2020-12-22 07:09:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:21,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:21,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:09:21,636 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2082908778, now seen corresponding path program 1 times [2020-12-22 07:09:21,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944423928] [2020-12-22 07:09:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:21,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944423928] [2020-12-22 07:09:21,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:21,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:21,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652418510] [2020-12-22 07:09:21,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:21,751 INFO L87 Difference]: Start difference. First operand 8789 states and 11785 transitions. Second operand 3 states. [2020-12-22 07:09:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:23,036 INFO L93 Difference]: Finished difference Result 25130 states and 33732 transitions. [2020-12-22 07:09:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:23,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:09:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:23,067 INFO L225 Difference]: With dead ends: 25130 [2020-12-22 07:09:23,068 INFO L226 Difference]: Without dead ends: 16409 [2020-12-22 07:09:23,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 07:09:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16409 states. [2020-12-22 07:09:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16409 to 16371. [2020-12-22 07:09:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16371 states. [2020-12-22 07:09:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16371 states to 16371 states and 21874 transitions. [2020-12-22 07:09:24,742 INFO L78 Accepts]: Start accepts. Automaton has 16371 states and 21874 transitions. Word has length 115 [2020-12-22 07:09:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:24,742 INFO L481 AbstractCegarLoop]: Abstraction has 16371 states and 21874 transitions. [2020-12-22 07:09:24,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 16371 states and 21874 transitions. [2020-12-22 07:09:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:24,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:24,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:24,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:09:24,750 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1980107531, now seen corresponding path program 1 times [2020-12-22 07:09:24,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:24,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588466436] [2020-12-22 07:09:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:24,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588466436] [2020-12-22 07:09:24,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:24,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16210635] [2020-12-22 07:09:24,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:24,816 INFO L87 Difference]: Start difference. First operand 16371 states and 21874 transitions. Second operand 5 states. [2020-12-22 07:09:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:27,001 INFO L93 Difference]: Finished difference Result 43381 states and 58417 transitions. [2020-12-22 07:09:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:27,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:27,034 INFO L225 Difference]: With dead ends: 43381 [2020-12-22 07:09:27,034 INFO L226 Difference]: Without dead ends: 27082 [2020-12-22 07:09:27,053 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 07:09:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27082 states. [2020-12-22 07:09:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27082 to 16728. [2020-12-22 07:09:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16728 states. [2020-12-22 07:09:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16728 states to 16728 states and 22129 transitions. [2020-12-22 07:09:28,789 INFO L78 Accepts]: Start accepts. Automaton has 16728 states and 22129 transitions. Word has length 115 [2020-12-22 07:09:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:28,789 INFO L481 AbstractCegarLoop]: Abstraction has 16728 states and 22129 transitions. [2020-12-22 07:09:28,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16728 states and 22129 transitions. [2020-12-22 07:09:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:28,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:28,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:28,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:09:28,792 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:28,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1833779507, now seen corresponding path program 1 times [2020-12-22 07:09:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:28,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968202509] [2020-12-22 07:09:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968202509] [2020-12-22 07:09:28,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:28,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084734697] [2020-12-22 07:09:28,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:28,871 INFO L87 Difference]: Start difference. First operand 16728 states and 22129 transitions. Second operand 4 states. [2020-12-22 07:09:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:31,017 INFO L93 Difference]: Finished difference Result 40971 states and 54131 transitions. [2020-12-22 07:09:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:31,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:31,041 INFO L225 Difference]: With dead ends: 40971 [2020-12-22 07:09:31,041 INFO L226 Difference]: Without dead ends: 24317 [2020-12-22 07:09:31,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24317 states. [2020-12-22 07:09:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24317 to 16728. [2020-12-22 07:09:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16728 states. [2020-12-22 07:09:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16728 states to 16728 states and 22056 transitions. [2020-12-22 07:09:32,508 INFO L78 Accepts]: Start accepts. Automaton has 16728 states and 22056 transitions. Word has length 115 [2020-12-22 07:09:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:32,509 INFO L481 AbstractCegarLoop]: Abstraction has 16728 states and 22056 transitions. [2020-12-22 07:09:32,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16728 states and 22056 transitions. [2020-12-22 07:09:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:32,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:32,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:32,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:09:32,512 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash -522025743, now seen corresponding path program 1 times [2020-12-22 07:09:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:32,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131736246] [2020-12-22 07:09:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:32,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131736246] [2020-12-22 07:09:32,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:32,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:32,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406954703] [2020-12-22 07:09:32,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:32,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:32,576 INFO L87 Difference]: Start difference. First operand 16728 states and 22056 transitions. Second operand 4 states. [2020-12-22 07:09:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:34,741 INFO L93 Difference]: Finished difference Result 43507 states and 57036 transitions. [2020-12-22 07:09:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:34,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:34,767 INFO L225 Difference]: With dead ends: 43507 [2020-12-22 07:09:34,767 INFO L226 Difference]: Without dead ends: 26854 [2020-12-22 07:09:34,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26854 states. [2020-12-22 07:09:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26854 to 19254. [2020-12-22 07:09:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19254 states. [2020-12-22 07:09:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19254 states to 19254 states and 25034 transitions. [2020-12-22 07:09:36,639 INFO L78 Accepts]: Start accepts. Automaton has 19254 states and 25034 transitions. Word has length 115 [2020-12-22 07:09:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:36,639 INFO L481 AbstractCegarLoop]: Abstraction has 19254 states and 25034 transitions. [2020-12-22 07:09:36,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19254 states and 25034 transitions. [2020-12-22 07:09:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:36,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:36,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:36,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:09:36,649 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -875114125, now seen corresponding path program 1 times [2020-12-22 07:09:36,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:36,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320431817] [2020-12-22 07:09:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:36,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320431817] [2020-12-22 07:09:36,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:36,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:36,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889113568] [2020-12-22 07:09:36,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:36,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:36,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:36,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:36,723 INFO L87 Difference]: Start difference. First operand 19254 states and 25034 transitions. Second operand 4 states. [2020-12-22 07:09:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:39,352 INFO L93 Difference]: Finished difference Result 47191 states and 61313 transitions. [2020-12-22 07:09:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:39,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:39,377 INFO L225 Difference]: With dead ends: 47191 [2020-12-22 07:09:39,378 INFO L226 Difference]: Without dead ends: 28075 [2020-12-22 07:09:39,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28075 states. [2020-12-22 07:09:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28075 to 19254. [2020-12-22 07:09:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19254 states. [2020-12-22 07:09:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19254 states to 19254 states and 24961 transitions. [2020-12-22 07:09:40,964 INFO L78 Accepts]: Start accepts. Automaton has 19254 states and 24961 transitions. Word has length 115 [2020-12-22 07:09:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:40,965 INFO L481 AbstractCegarLoop]: Abstraction has 19254 states and 24961 transitions. [2020-12-22 07:09:40,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19254 states and 24961 transitions. [2020-12-22 07:09:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:40,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:40,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:40,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:09:40,967 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1053158577, now seen corresponding path program 1 times [2020-12-22 07:09:40,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:40,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57040048] [2020-12-22 07:09:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:41,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57040048] [2020-12-22 07:09:41,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281125930] [2020-12-22 07:09:41,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:41,029 INFO L87 Difference]: Start difference. First operand 19254 states and 24961 transitions. Second operand 4 states. [2020-12-22 07:09:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:43,396 INFO L93 Difference]: Finished difference Result 46591 states and 60356 transitions. [2020-12-22 07:09:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:43,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:43,425 INFO L225 Difference]: With dead ends: 46591 [2020-12-22 07:09:43,425 INFO L226 Difference]: Without dead ends: 27479 [2020-12-22 07:09:43,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27479 states. [2020-12-22 07:09:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27479 to 18894. [2020-12-22 07:09:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18894 states. [2020-12-22 07:09:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18894 states to 18894 states and 24288 transitions. [2020-12-22 07:09:45,074 INFO L78 Accepts]: Start accepts. Automaton has 18894 states and 24288 transitions. Word has length 115 [2020-12-22 07:09:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:45,074 INFO L481 AbstractCegarLoop]: Abstraction has 18894 states and 24288 transitions. [2020-12-22 07:09:45,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18894 states and 24288 transitions. [2020-12-22 07:09:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:45,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:45,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:45,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:09:45,077 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1301305071, now seen corresponding path program 1 times [2020-12-22 07:09:45,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:45,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874814412] [2020-12-22 07:09:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:45,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874814412] [2020-12-22 07:09:45,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:45,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890215155] [2020-12-22 07:09:45,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:45,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:45,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:45,129 INFO L87 Difference]: Start difference. First operand 18894 states and 24288 transitions. Second operand 4 states. [2020-12-22 07:09:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:47,492 INFO L93 Difference]: Finished difference Result 45793 states and 58845 transitions. [2020-12-22 07:09:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:47,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:47,521 INFO L225 Difference]: With dead ends: 45793 [2020-12-22 07:09:47,521 INFO L226 Difference]: Without dead ends: 27042 [2020-12-22 07:09:47,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27042 states. [2020-12-22 07:09:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27042 to 18630. [2020-12-22 07:09:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18630 states. [2020-12-22 07:09:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18630 states to 18630 states and 23775 transitions. [2020-12-22 07:09:49,235 INFO L78 Accepts]: Start accepts. Automaton has 18630 states and 23775 transitions. Word has length 115 [2020-12-22 07:09:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:49,236 INFO L481 AbstractCegarLoop]: Abstraction has 18630 states and 23775 transitions. [2020-12-22 07:09:49,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 18630 states and 23775 transitions. [2020-12-22 07:09:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:49,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:49,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:49,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:09:49,238 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1724951793, now seen corresponding path program 1 times [2020-12-22 07:09:49,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:49,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428469499] [2020-12-22 07:09:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:49,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428469499] [2020-12-22 07:09:49,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:49,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:49,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871185044] [2020-12-22 07:09:49,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:49,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:49,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:49,293 INFO L87 Difference]: Start difference. First operand 18630 states and 23775 transitions. Second operand 4 states. [2020-12-22 07:09:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:52,215 INFO L93 Difference]: Finished difference Result 50520 states and 64098 transitions. [2020-12-22 07:09:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:52,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:52,246 INFO L225 Difference]: With dead ends: 50520 [2020-12-22 07:09:52,246 INFO L226 Difference]: Without dead ends: 31971 [2020-12-22 07:09:52,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31971 states. [2020-12-22 07:09:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31971 to 23218. [2020-12-22 07:09:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23218 states. [2020-12-22 07:09:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23218 states to 23218 states and 28969 transitions. [2020-12-22 07:09:54,327 INFO L78 Accepts]: Start accepts. Automaton has 23218 states and 28969 transitions. Word has length 115 [2020-12-22 07:09:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:54,327 INFO L481 AbstractCegarLoop]: Abstraction has 23218 states and 28969 transitions. [2020-12-22 07:09:54,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 23218 states and 28969 transitions. [2020-12-22 07:09:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:54,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:54,329 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:09:54,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:09:54,329 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:54,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash -120415373, now seen corresponding path program 1 times [2020-12-22 07:09:54,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:54,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646426984] [2020-12-22 07:09:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:54,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646426984] [2020-12-22 07:09:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:54,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618920595] [2020-12-22 07:09:54,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:54,381 INFO L87 Difference]: Start difference. First operand 23218 states and 28969 transitions. Second operand 4 states. [2020-12-22 07:09:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:57,855 INFO L93 Difference]: Finished difference Result 55753 states and 69586 transitions. [2020-12-22 07:09:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:57,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:57,891 INFO L225 Difference]: With dead ends: 55753 [2020-12-22 07:09:57,891 INFO L226 Difference]: Without dead ends: 32797 [2020-12-22 07:09:58,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32797 states. [2020-12-22 07:10:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32797 to 22894. [2020-12-22 07:10:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22894 states. [2020-12-22 07:10:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 28356 transitions. [2020-12-22 07:10:00,223 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 28356 transitions. Word has length 115 [2020-12-22 07:10:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:00,223 INFO L481 AbstractCegarLoop]: Abstraction has 22894 states and 28356 transitions. [2020-12-22 07:10:00,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 28356 transitions. [2020-12-22 07:10:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:10:00,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:00,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:10:00,230 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1149774671, now seen corresponding path program 1 times [2020-12-22 07:10:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:00,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688481771] [2020-12-22 07:10:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688481771] [2020-12-22 07:10:00,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:00,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:00,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134478327] [2020-12-22 07:10:00,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:00,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:00,296 INFO L87 Difference]: Start difference. First operand 22894 states and 28356 transitions. Second operand 4 states. [2020-12-22 07:10:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:03,397 INFO L93 Difference]: Finished difference Result 54641 states and 67550 transitions. [2020-12-22 07:10:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:03,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:10:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:03,425 INFO L225 Difference]: With dead ends: 54641 [2020-12-22 07:10:03,425 INFO L226 Difference]: Without dead ends: 31944 [2020-12-22 07:10:03,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31944 states. [2020-12-22 07:10:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31944 to 21934. [2020-12-22 07:10:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21934 states. [2020-12-22 07:10:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21934 states to 21934 states and 26683 transitions. [2020-12-22 07:10:05,587 INFO L78 Accepts]: Start accepts. Automaton has 21934 states and 26683 transitions. Word has length 115 [2020-12-22 07:10:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:05,587 INFO L481 AbstractCegarLoop]: Abstraction has 21934 states and 26683 transitions. [2020-12-22 07:10:05,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21934 states and 26683 transitions. [2020-12-22 07:10:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:10:05,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:05,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:05,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:10:05,590 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash -490243149, now seen corresponding path program 1 times [2020-12-22 07:10:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:05,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511837261] [2020-12-22 07:10:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:05,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511837261] [2020-12-22 07:10:05,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:05,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:05,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319390163] [2020-12-22 07:10:05,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:05,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:05,666 INFO L87 Difference]: Start difference. First operand 21934 states and 26683 transitions. Second operand 4 states. [2020-12-22 07:10:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:08,593 INFO L93 Difference]: Finished difference Result 52322 states and 63648 transitions. [2020-12-22 07:10:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:08,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:10:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:08,621 INFO L225 Difference]: With dead ends: 52322 [2020-12-22 07:10:08,621 INFO L226 Difference]: Without dead ends: 30640 [2020-12-22 07:10:08,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:10:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30640 states. [2020-12-22 07:10:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30640 to 21469. [2020-12-22 07:10:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21469 states. [2020-12-22 07:10:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21469 states to 21469 states and 25835 transitions. [2020-12-22 07:10:10,653 INFO L78 Accepts]: Start accepts. Automaton has 21469 states and 25835 transitions. Word has length 115 [2020-12-22 07:10:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:10,653 INFO L481 AbstractCegarLoop]: Abstraction has 21469 states and 25835 transitions. [2020-12-22 07:10:10,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 21469 states and 25835 transitions. [2020-12-22 07:10:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:10:10,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:10,655 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:10,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:10:10,655 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash -884609935, now seen corresponding path program 1 times [2020-12-22 07:10:10,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:10,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179897041] [2020-12-22 07:10:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:10,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179897041] [2020-12-22 07:10:10,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:10,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814585246] [2020-12-22 07:10:10,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:10,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:10,738 INFO L87 Difference]: Start difference. First operand 21469 states and 25835 transitions. Second operand 3 states. [2020-12-22 07:10:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:14,526 INFO L93 Difference]: Finished difference Result 62541 states and 74743 transitions. [2020-12-22 07:10:14,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:14,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:10:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:14,567 INFO L225 Difference]: With dead ends: 62541 [2020-12-22 07:10:14,568 INFO L226 Difference]: Without dead ends: 41324 [2020-12-22 07:10:14,582 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 07:10:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41324 states. [2020-12-22 07:10:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41324 to 41324. [2020-12-22 07:10:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41324 states. [2020-12-22 07:10:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41324 states to 41324 states and 49048 transitions. [2020-12-22 07:10:18,779 INFO L78 Accepts]: Start accepts. Automaton has 41324 states and 49048 transitions. Word has length 115 [2020-12-22 07:10:18,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:18,780 INFO L481 AbstractCegarLoop]: Abstraction has 41324 states and 49048 transitions. [2020-12-22 07:10:18,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41324 states and 49048 transitions. [2020-12-22 07:10:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:18,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:18,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:18,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:10:18,783 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1414700966, now seen corresponding path program 1 times [2020-12-22 07:10:18,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:18,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999950937] [2020-12-22 07:10:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:18,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999950937] [2020-12-22 07:10:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:18,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520191479] [2020-12-22 07:10:18,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:18,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:18,841 INFO L87 Difference]: Start difference. First operand 41324 states and 49048 transitions. Second operand 3 states. [2020-12-22 07:10:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:26,293 INFO L93 Difference]: Finished difference Result 119244 states and 141226 transitions. [2020-12-22 07:10:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:26,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:26,382 INFO L225 Difference]: With dead ends: 119244 [2020-12-22 07:10:26,382 INFO L226 Difference]: Without dead ends: 78420 [2020-12-22 07:10:26,419 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 07:10:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78420 states. [2020-12-22 07:10:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78420 to 78418. [2020-12-22 07:10:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78418 states. [2020-12-22 07:10:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78418 states to 78418 states and 92560 transitions. [2020-12-22 07:10:33,994 INFO L78 Accepts]: Start accepts. Automaton has 78418 states and 92560 transitions. Word has length 116 [2020-12-22 07:10:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:33,995 INFO L481 AbstractCegarLoop]: Abstraction has 78418 states and 92560 transitions. [2020-12-22 07:10:33,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 78418 states and 92560 transitions. [2020-12-22 07:10:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:34,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:34,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:10:34,001 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -232661976, now seen corresponding path program 1 times [2020-12-22 07:10:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:34,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228508857] [2020-12-22 07:10:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:10:34,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228508857] [2020-12-22 07:10:34,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:34,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:34,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601488577] [2020-12-22 07:10:34,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:34,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:34,030 INFO L87 Difference]: Start difference. First operand 78418 states and 92560 transitions. Second operand 3 states. [2020-12-22 07:10:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:41,715 INFO L93 Difference]: Finished difference Result 155844 states and 184005 transitions. [2020-12-22 07:10:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:41,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:41,815 INFO L225 Difference]: With dead ends: 155844 [2020-12-22 07:10:41,815 INFO L226 Difference]: Without dead ends: 77926 [2020-12-22 07:10:41,874 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 07:10:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77926 states. [2020-12-22 07:10:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77926 to 77926. [2020-12-22 07:10:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77926 states. [2020-12-22 07:10:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77926 states to 77926 states and 92006 transitions. [2020-12-22 07:10:49,885 INFO L78 Accepts]: Start accepts. Automaton has 77926 states and 92006 transitions. Word has length 116 [2020-12-22 07:10:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:49,886 INFO L481 AbstractCegarLoop]: Abstraction has 77926 states and 92006 transitions. [2020-12-22 07:10:49,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77926 states and 92006 transitions. [2020-12-22 07:10:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 07:10:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:49,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:10:49,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:10:49,889 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2132631290, now seen corresponding path program 1 times [2020-12-22 07:10:49,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:49,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143452996] [2020-12-22 07:10:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:49,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143452996] [2020-12-22 07:10:49,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:49,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:49,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337558566] [2020-12-22 07:10:49,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:49,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:49,948 INFO L87 Difference]: Start difference. First operand 77926 states and 92006 transitions. Second operand 3 states. [2020-12-22 07:11:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:04,349 INFO L93 Difference]: Finished difference Result 228656 states and 269532 transitions. [2020-12-22 07:11:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:04,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 07:11:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:04,718 INFO L225 Difference]: With dead ends: 228656 [2020-12-22 07:11:04,718 INFO L226 Difference]: Without dead ends: 151230 [2020-12-22 07:11:04,781 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 07:11:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151230 states. [2020-12-22 07:11:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151230 to 147796. [2020-12-22 07:11:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147796 states. [2020-12-22 07:11:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147796 states to 147796 states and 174042 transitions. [2020-12-22 07:11:19,876 INFO L78 Accepts]: Start accepts. Automaton has 147796 states and 174042 transitions. Word has length 117 [2020-12-22 07:11:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:19,876 INFO L481 AbstractCegarLoop]: Abstraction has 147796 states and 174042 transitions. [2020-12-22 07:11:19,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 147796 states and 174042 transitions. [2020-12-22 07:11:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 07:11:19,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:19,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:11:19,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:11:19,885 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash 514973064, now seen corresponding path program 1 times [2020-12-22 07:11:19,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:19,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425001818] [2020-12-22 07:11:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:11:19,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425001818] [2020-12-22 07:11:19,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:19,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:19,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891927845] [2020-12-22 07:11:19,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:19,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:19,937 INFO L87 Difference]: Start difference. First operand 147796 states and 174042 transitions. Second operand 3 states. [2020-12-22 07:11:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:34,697 INFO L93 Difference]: Finished difference Result 294816 states and 347207 transitions. [2020-12-22 07:11:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:34,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 07:11:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:34,905 INFO L225 Difference]: With dead ends: 294816 [2020-12-22 07:11:34,905 INFO L226 Difference]: Without dead ends: 147306 [2020-12-22 07:11:35,179 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 07:11:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147306 states.