/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:01:48,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:01:48,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:01:48,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:01:48,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:01:48,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:01:48,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:01:48,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:01:48,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:01:48,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:01:48,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:01:48,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:01:48,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:01:48,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:01:48,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:01:48,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:01:48,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:01:48,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:01:48,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:01:48,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:01:48,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:01:48,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:01:48,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:01:48,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:01:48,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:01:48,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:01:48,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:01:48,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:01:48,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:01:48,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:01:48,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:01:48,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:01:48,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:01:48,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:01:48,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:01:48,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:01:48,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:01:48,629 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:01:48,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:01:48,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:01:48,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:01:48,635 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:01:48,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:01:48,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:01:48,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:01:48,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:01:48,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:01:48,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:01:48,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:01:48,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:01:48,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:01:48,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:01:48,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:01:48,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:01:48,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:01:48,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:01:48,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:01:48,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:01:48,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:01:48,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:01:48,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:01:48,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:01:48,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:01:49,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:01:49,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:01:49,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:01:49,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:01:49,073 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:01:49,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:49,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930f5dc93/ad960cf2d66d48bc9a0ff5b28aa1354b/FLAGf26414b7b [2020-12-22 09:01:49,829 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:01:49,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:49,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930f5dc93/ad960cf2d66d48bc9a0ff5b28aa1354b/FLAGf26414b7b [2020-12-22 09:01:50,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930f5dc93/ad960cf2d66d48bc9a0ff5b28aa1354b [2020-12-22 09:01:50,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:01:50,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:01:50,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:50,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:01:50,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:01:50,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:50,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ba0b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50, skipping insertion in model container [2020-12-22 09:01:50,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:50,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:01:50,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:01:50,597 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7516,7529] [2020-12-22 09:01:50,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:50,715 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:01:50,825 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7516,7529] [2020-12-22 09:01:50,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:01:50,875 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:01:50,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50 WrapperNode [2020-12-22 09:01:50,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:01:50,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:50,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:01:50,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:01:50,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:50,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:50,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:01:50,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:01:50,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:01:50,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:01:51,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (1/1) ... [2020-12-22 09:01:51,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:01:51,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:01:51,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:01:51,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:01:51,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (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 09:01:51,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:01:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:01:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:01:51,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:01:52,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:01:52,229 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:01:52,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:52 BoogieIcfgContainer [2020-12-22 09:01:52,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:01:52,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:01:52,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:01:52,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:01:52,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:01:50" (1/3) ... [2020-12-22 09:01:52,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec64c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:52, skipping insertion in model container [2020-12-22 09:01:52,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:01:50" (2/3) ... [2020-12-22 09:01:52,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec64c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:01:52, skipping insertion in model container [2020-12-22 09:01:52,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:01:52" (3/3) ... [2020-12-22 09:01:52,242 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 09:01:52,249 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:01:52,262 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:01:52,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:01:52,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:01:52,318 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:01:52,318 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:01:52,318 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:01:52,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:01:52,319 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:01:52,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:01:52,319 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:01:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states. [2020-12-22 09:01:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 09:01:52,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:52,361 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] [2020-12-22 09:01:52,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1975649421, now seen corresponding path program 1 times [2020-12-22 09:01:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:52,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403165000] [2020-12-22 09:01:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:53,052 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 09:01:53,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403165000] [2020-12-22 09:01:53,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:53,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591059281] [2020-12-22 09:01:53,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:53,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:53,083 INFO L87 Difference]: Start difference. First operand 155 states. Second operand 3 states. [2020-12-22 09:01:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:53,275 INFO L93 Difference]: Finished difference Result 341 states and 571 transitions. [2020-12-22 09:01:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:53,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 09:01:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:53,319 INFO L225 Difference]: With dead ends: 341 [2020-12-22 09:01:53,319 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 09:01:53,324 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 09:01:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 09:01:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-12-22 09:01:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 09:01:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 365 transitions. [2020-12-22 09:01:53,443 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 365 transitions. Word has length 62 [2020-12-22 09:01:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:53,443 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 365 transitions. [2020-12-22 09:01:53,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 365 transitions. [2020-12-22 09:01:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:01:53,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:53,453 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] [2020-12-22 09:01:53,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:01:53,455 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1826541876, now seen corresponding path program 1 times [2020-12-22 09:01:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:53,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794441732] [2020-12-22 09:01:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:53,625 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 09:01:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794441732] [2020-12-22 09:01:53,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:53,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091346634] [2020-12-22 09:01:53,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:53,630 INFO L87 Difference]: Start difference. First operand 234 states and 365 transitions. Second operand 3 states. [2020-12-22 09:01:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:53,700 INFO L93 Difference]: Finished difference Result 572 states and 917 transitions. [2020-12-22 09:01:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:53,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:01:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:53,705 INFO L225 Difference]: With dead ends: 572 [2020-12-22 09:01:53,705 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 09:01:53,707 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 09:01:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 09:01:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 391. [2020-12-22 09:01:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-22 09:01:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 620 transitions. [2020-12-22 09:01:53,768 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 620 transitions. Word has length 64 [2020-12-22 09:01:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:53,769 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 620 transitions. [2020-12-22 09:01:53,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 620 transitions. [2020-12-22 09:01:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:01:53,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:53,777 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] [2020-12-22 09:01:53,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:01:53,778 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1385775307, now seen corresponding path program 1 times [2020-12-22 09:01:53,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:53,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942228328] [2020-12-22 09:01:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:53,928 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 09:01:53,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942228328] [2020-12-22 09:01:53,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:53,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725484039] [2020-12-22 09:01:53,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:53,931 INFO L87 Difference]: Start difference. First operand 391 states and 620 transitions. Second operand 3 states. [2020-12-22 09:01:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:54,011 INFO L93 Difference]: Finished difference Result 1027 states and 1654 transitions. [2020-12-22 09:01:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:54,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:01:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:54,016 INFO L225 Difference]: With dead ends: 1027 [2020-12-22 09:01:54,017 INFO L226 Difference]: Without dead ends: 693 [2020-12-22 09:01:54,019 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 09:01:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-12-22 09:01:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2020-12-22 09:01:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-12-22 09:01:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1096 transitions. [2020-12-22 09:01:54,103 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1096 transitions. Word has length 66 [2020-12-22 09:01:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:54,112 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 1096 transitions. [2020-12-22 09:01:54,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1096 transitions. [2020-12-22 09:01:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:01:54,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:54,118 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] [2020-12-22 09:01:54,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:01:54,118 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash -190660810, now seen corresponding path program 1 times [2020-12-22 09:01:54,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:54,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558422855] [2020-12-22 09:01:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:54,365 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 09:01:54,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558422855] [2020-12-22 09:01:54,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:54,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:01:54,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907277080] [2020-12-22 09:01:54,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:01:54,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:01:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:54,374 INFO L87 Difference]: Start difference. First operand 687 states and 1096 transitions. Second operand 5 states. [2020-12-22 09:01:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:54,783 INFO L93 Difference]: Finished difference Result 2979 states and 4854 transitions. [2020-12-22 09:01:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:01:54,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 09:01:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:54,801 INFO L225 Difference]: With dead ends: 2979 [2020-12-22 09:01:54,801 INFO L226 Difference]: Without dead ends: 2349 [2020-12-22 09:01:54,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:01:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2020-12-22 09:01:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1239. [2020-12-22 09:01:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1239 states. [2020-12-22 09:01:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1991 transitions. [2020-12-22 09:01:54,940 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1991 transitions. Word has length 68 [2020-12-22 09:01:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:54,940 INFO L481 AbstractCegarLoop]: Abstraction has 1239 states and 1991 transitions. [2020-12-22 09:01:54,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:01:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1991 transitions. [2020-12-22 09:01:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:01:54,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:54,944 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] [2020-12-22 09:01:54,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:01:54,945 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1678021987, now seen corresponding path program 1 times [2020-12-22 09:01:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:54,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195705706] [2020-12-22 09:01:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:55,093 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 09:01:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195705706] [2020-12-22 09:01:55,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:55,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658499358] [2020-12-22 09:01:55,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:55,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:55,099 INFO L87 Difference]: Start difference. First operand 1239 states and 1991 transitions. Second operand 4 states. [2020-12-22 09:01:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:55,371 INFO L93 Difference]: Finished difference Result 3619 states and 5887 transitions. [2020-12-22 09:01:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:55,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 09:01:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:55,388 INFO L225 Difference]: With dead ends: 3619 [2020-12-22 09:01:55,388 INFO L226 Difference]: Without dead ends: 2437 [2020-12-22 09:01:55,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 09:01:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-12-22 09:01:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1829. [2020-12-22 09:01:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1829 states. [2020-12-22 09:01:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2952 transitions. [2020-12-22 09:01:55,547 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2952 transitions. Word has length 69 [2020-12-22 09:01:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:55,547 INFO L481 AbstractCegarLoop]: Abstraction has 1829 states and 2952 transitions. [2020-12-22 09:01:55,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2952 transitions. [2020-12-22 09:01:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:01:55,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:55,549 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] [2020-12-22 09:01:55,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:01:55,550 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -537020195, now seen corresponding path program 1 times [2020-12-22 09:01:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:55,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035940317] [2020-12-22 09:01:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:55,662 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 09:01:55,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035940317] [2020-12-22 09:01:55,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:55,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:55,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934198161] [2020-12-22 09:01:55,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:55,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:55,666 INFO L87 Difference]: Start difference. First operand 1829 states and 2952 transitions. Second operand 4 states. [2020-12-22 09:01:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:55,987 INFO L93 Difference]: Finished difference Result 5465 states and 8877 transitions. [2020-12-22 09:01:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:55,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 09:01:55,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:56,007 INFO L225 Difference]: With dead ends: 5465 [2020-12-22 09:01:56,008 INFO L226 Difference]: Without dead ends: 3693 [2020-12-22 09:01:56,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2020-12-22 09:01:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 2673. [2020-12-22 09:01:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2673 states. [2020-12-22 09:01:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 4312 transitions. [2020-12-22 09:01:56,223 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 4312 transitions. Word has length 70 [2020-12-22 09:01:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:56,223 INFO L481 AbstractCegarLoop]: Abstraction has 2673 states and 4312 transitions. [2020-12-22 09:01:56,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 4312 transitions. [2020-12-22 09:01:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 09:01:56,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:56,228 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] [2020-12-22 09:01:56,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:01:56,228 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:56,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash 478855012, now seen corresponding path program 1 times [2020-12-22 09:01:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:56,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922957552] [2020-12-22 09:01:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:56,333 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 09:01:56,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922957552] [2020-12-22 09:01:56,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:56,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:01:56,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164970075] [2020-12-22 09:01:56,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:01:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:01:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:01:56,337 INFO L87 Difference]: Start difference. First operand 2673 states and 4312 transitions. Second operand 4 states. [2020-12-22 09:01:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:56,786 INFO L93 Difference]: Finished difference Result 7713 states and 12507 transitions. [2020-12-22 09:01:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:01:56,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 09:01:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:56,815 INFO L225 Difference]: With dead ends: 7713 [2020-12-22 09:01:56,815 INFO L226 Difference]: Without dead ends: 5097 [2020-12-22 09:01:56,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:01:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2020-12-22 09:01:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3869. [2020-12-22 09:01:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3869 states. [2020-12-22 09:01:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 6234 transitions. [2020-12-22 09:01:57,147 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 6234 transitions. Word has length 71 [2020-12-22 09:01:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:57,147 INFO L481 AbstractCegarLoop]: Abstraction has 3869 states and 6234 transitions. [2020-12-22 09:01:57,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:01:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 6234 transitions. [2020-12-22 09:01:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:01:57,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:57,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:57,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:01:57,157 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1637619353, now seen corresponding path program 1 times [2020-12-22 09:01:57,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:57,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178776550] [2020-12-22 09:01:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:57,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178776550] [2020-12-22 09:01:57,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:57,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:57,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405936453] [2020-12-22 09:01:57,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:57,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:57,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:57,226 INFO L87 Difference]: Start difference. First operand 3869 states and 6234 transitions. Second operand 3 states. [2020-12-22 09:01:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:57,613 INFO L93 Difference]: Finished difference Result 8646 states and 14040 transitions. [2020-12-22 09:01:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:57,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:01:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:57,646 INFO L225 Difference]: With dead ends: 8646 [2020-12-22 09:01:57,646 INFO L226 Difference]: Without dead ends: 5881 [2020-12-22 09:01:57,652 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 09:01:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5881 states. [2020-12-22 09:01:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5881 to 5879. [2020-12-22 09:01:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5879 states. [2020-12-22 09:01:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5879 states to 5879 states and 9478 transitions. [2020-12-22 09:01:58,117 INFO L78 Accepts]: Start accepts. Automaton has 5879 states and 9478 transitions. Word has length 72 [2020-12-22 09:01:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:58,117 INFO L481 AbstractCegarLoop]: Abstraction has 5879 states and 9478 transitions. [2020-12-22 09:01:58,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 5879 states and 9478 transitions. [2020-12-22 09:01:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:01:58,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:58,119 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] [2020-12-22 09:01:58,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:01:58,119 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1419254461, now seen corresponding path program 1 times [2020-12-22 09:01:58,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:58,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68137966] [2020-12-22 09:01:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:01:58,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68137966] [2020-12-22 09:01:58,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:58,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:58,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766390743] [2020-12-22 09:01:58,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:58,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:58,196 INFO L87 Difference]: Start difference. First operand 5879 states and 9478 transitions. Second operand 3 states. [2020-12-22 09:01:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:58,770 INFO L93 Difference]: Finished difference Result 12993 states and 20995 transitions. [2020-12-22 09:01:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:58,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:01:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:58,816 INFO L225 Difference]: With dead ends: 12993 [2020-12-22 09:01:58,822 INFO L226 Difference]: Without dead ends: 8823 [2020-12-22 09:01:58,831 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 09:01:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2020-12-22 09:01:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 8821. [2020-12-22 09:01:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 09:01:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 14158 transitions. [2020-12-22 09:01:59,500 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 14158 transitions. Word has length 72 [2020-12-22 09:01:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:59,500 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 14158 transitions. [2020-12-22 09:01:59,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 14158 transitions. [2020-12-22 09:01:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 09:01:59,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:59,502 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] [2020-12-22 09:01:59,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:01:59,503 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash 569279253, now seen corresponding path program 1 times [2020-12-22 09:01:59,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:59,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518865952] [2020-12-22 09:01:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:59,558 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 09:01:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518865952] [2020-12-22 09:01:59,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:59,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:59,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175389236] [2020-12-22 09:01:59,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:59,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:59,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:59,561 INFO L87 Difference]: Start difference. First operand 8821 states and 14158 transitions. Second operand 3 states. [2020-12-22 09:02:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:00,266 INFO L93 Difference]: Finished difference Result 19170 states and 30844 transitions. [2020-12-22 09:02:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:00,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 09:02:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:00,352 INFO L225 Difference]: With dead ends: 19170 [2020-12-22 09:02:00,352 INFO L226 Difference]: Without dead ends: 12906 [2020-12-22 09:02:00,364 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 09:02:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2020-12-22 09:02:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 12904. [2020-12-22 09:02:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12904 states. [2020-12-22 09:02:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12904 states to 12904 states and 20605 transitions. [2020-12-22 09:02:01,333 INFO L78 Accepts]: Start accepts. Automaton has 12904 states and 20605 transitions. Word has length 72 [2020-12-22 09:02:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:01,334 INFO L481 AbstractCegarLoop]: Abstraction has 12904 states and 20605 transitions. [2020-12-22 09:02:01,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12904 states and 20605 transitions. [2020-12-22 09:02:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 09:02:01,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:01,335 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] [2020-12-22 09:02:01,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:02:01,335 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash -899144939, now seen corresponding path program 1 times [2020-12-22 09:02:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:01,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795609849] [2020-12-22 09:02:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:01,524 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 09:02:01,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795609849] [2020-12-22 09:02:01,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:01,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542825559] [2020-12-22 09:02:01,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:01,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:01,528 INFO L87 Difference]: Start difference. First operand 12904 states and 20605 transitions. Second operand 4 states. [2020-12-22 09:02:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:02,964 INFO L93 Difference]: Finished difference Result 37941 states and 60544 transitions. [2020-12-22 09:02:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:02,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 09:02:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:03,033 INFO L225 Difference]: With dead ends: 37941 [2020-12-22 09:02:03,033 INFO L226 Difference]: Without dead ends: 25046 [2020-12-22 09:02:03,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25046 states. [2020-12-22 09:02:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25046 to 25044. [2020-12-22 09:02:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25044 states. [2020-12-22 09:02:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25044 states to 25044 states and 39727 transitions. [2020-12-22 09:02:04,702 INFO L78 Accepts]: Start accepts. Automaton has 25044 states and 39727 transitions. Word has length 73 [2020-12-22 09:02:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:04,702 INFO L481 AbstractCegarLoop]: Abstraction has 25044 states and 39727 transitions. [2020-12-22 09:02:04,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:02:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25044 states and 39727 transitions. [2020-12-22 09:02:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:02:04,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:04,704 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] [2020-12-22 09:02:04,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:02:04,705 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1735035679, now seen corresponding path program 1 times [2020-12-22 09:02:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:04,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041409951] [2020-12-22 09:02:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:04,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041409951] [2020-12-22 09:02:04,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:04,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:04,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956195222] [2020-12-22 09:02:04,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:04,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:04,748 INFO L87 Difference]: Start difference. First operand 25044 states and 39727 transitions. Second operand 3 states. [2020-12-22 09:02:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:07,428 INFO L93 Difference]: Finished difference Result 75094 states and 119119 transitions. [2020-12-22 09:02:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:07,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:02:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:07,592 INFO L225 Difference]: With dead ends: 75094 [2020-12-22 09:02:07,593 INFO L226 Difference]: Without dead ends: 50078 [2020-12-22 09:02:07,632 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 09:02:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50078 states. [2020-12-22 09:02:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50078 to 25046. [2020-12-22 09:02:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25046 states. [2020-12-22 09:02:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 39729 transitions. [2020-12-22 09:02:09,710 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 39729 transitions. Word has length 74 [2020-12-22 09:02:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:09,711 INFO L481 AbstractCegarLoop]: Abstraction has 25046 states and 39729 transitions. [2020-12-22 09:02:09,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 39729 transitions. [2020-12-22 09:02:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 09:02:09,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:09,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:02:09,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:02:09,715 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:09,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1282212699, now seen corresponding path program 1 times [2020-12-22 09:02:09,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:09,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936403685] [2020-12-22 09:02:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:09,769 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 09:02:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936403685] [2020-12-22 09:02:09,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:09,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:09,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526816026] [2020-12-22 09:02:09,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:09,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:09,771 INFO L87 Difference]: Start difference. First operand 25046 states and 39729 transitions. Second operand 3 states. [2020-12-22 09:02:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:12,052 INFO L93 Difference]: Finished difference Result 60529 states and 96542 transitions. [2020-12-22 09:02:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:12,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 09:02:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:12,128 INFO L225 Difference]: With dead ends: 60529 [2020-12-22 09:02:12,128 INFO L226 Difference]: Without dead ends: 35612 [2020-12-22 09:02:12,159 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 09:02:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35612 states. [2020-12-22 09:02:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35612 to 34336. [2020-12-22 09:02:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34336 states. [2020-12-22 09:02:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34336 states to 34336 states and 54396 transitions. [2020-12-22 09:02:14,516 INFO L78 Accepts]: Start accepts. Automaton has 34336 states and 54396 transitions. Word has length 74 [2020-12-22 09:02:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:14,516 INFO L481 AbstractCegarLoop]: Abstraction has 34336 states and 54396 transitions. [2020-12-22 09:02:14,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 34336 states and 54396 transitions. [2020-12-22 09:02:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:02:14,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:14,518 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] [2020-12-22 09:02:14,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:02:14,518 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1471377814, now seen corresponding path program 1 times [2020-12-22 09:02:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:14,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234343618] [2020-12-22 09:02:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:02:14,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234343618] [2020-12-22 09:02:14,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:14,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:02:14,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574837342] [2020-12-22 09:02:14,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:02:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:02:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:02:14,593 INFO L87 Difference]: Start difference. First operand 34336 states and 54396 transitions. Second operand 3 states. [2020-12-22 09:02:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:18,146 INFO L93 Difference]: Finished difference Result 100709 states and 159458 transitions. [2020-12-22 09:02:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:02:18,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 09:02:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:18,262 INFO L225 Difference]: With dead ends: 100709 [2020-12-22 09:02:18,262 INFO L226 Difference]: Without dead ends: 66546 [2020-12-22 09:02:18,310 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 09:02:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66546 states. [2020-12-22 09:02:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66546 to 66544. [2020-12-22 09:02:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66544 states. [2020-12-22 09:02:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66544 states to 66544 states and 104661 transitions. [2020-12-22 09:02:22,667 INFO L78 Accepts]: Start accepts. Automaton has 66544 states and 104661 transitions. Word has length 75 [2020-12-22 09:02:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:22,667 INFO L481 AbstractCegarLoop]: Abstraction has 66544 states and 104661 transitions. [2020-12-22 09:02:22,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:02:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 66544 states and 104661 transitions. [2020-12-22 09:02:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:02:22,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:22,669 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] [2020-12-22 09:02:22,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:02:22,670 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 20351833, now seen corresponding path program 1 times [2020-12-22 09:02:22,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:22,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740339176] [2020-12-22 09:02:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:22,797 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 09:02:22,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740339176] [2020-12-22 09:02:22,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:22,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:02:22,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453061640] [2020-12-22 09:02:22,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:02:22,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:02:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:22,800 INFO L87 Difference]: Start difference. First operand 66544 states and 104661 transitions. Second operand 5 states. [2020-12-22 09:02:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:30,616 INFO L93 Difference]: Finished difference Result 187298 states and 294406 transitions. [2020-12-22 09:02:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:30,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 09:02:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:30,987 INFO L225 Difference]: With dead ends: 187298 [2020-12-22 09:02:30,987 INFO L226 Difference]: Without dead ends: 120768 [2020-12-22 09:02:31,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120768 states. [2020-12-22 09:02:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120768 to 120766. [2020-12-22 09:02:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120766 states. [2020-12-22 09:02:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120766 states to 120766 states and 188351 transitions. [2020-12-22 09:02:38,701 INFO L78 Accepts]: Start accepts. Automaton has 120766 states and 188351 transitions. Word has length 75 [2020-12-22 09:02:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:38,702 INFO L481 AbstractCegarLoop]: Abstraction has 120766 states and 188351 transitions. [2020-12-22 09:02:38,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:02:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 120766 states and 188351 transitions. [2020-12-22 09:02:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 09:02:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:38,704 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] [2020-12-22 09:02:38,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:02:38,705 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -259692172, now seen corresponding path program 1 times [2020-12-22 09:02:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:38,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868365889] [2020-12-22 09:02:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:38,872 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 09:02:38,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868365889] [2020-12-22 09:02:38,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:38,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:02:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581054544] [2020-12-22 09:02:38,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:02:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:02:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:02:38,877 INFO L87 Difference]: Start difference. First operand 120766 states and 188351 transitions. Second operand 4 states. [2020-12-22 09:02:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:53,305 INFO L93 Difference]: Finished difference Result 354543 states and 552356 transitions. [2020-12-22 09:02:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:02:53,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 09:02:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:53,988 INFO L225 Difference]: With dead ends: 354543 [2020-12-22 09:02:53,988 INFO L226 Difference]: Without dead ends: 233833 [2020-12-22 09:02:54,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:02:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233833 states. [2020-12-22 09:03:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233833 to 233831. [2020-12-22 09:03:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233831 states. [2020-12-22 09:03:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233831 states to 233831 states and 361969 transitions. [2020-12-22 09:03:09,767 INFO L78 Accepts]: Start accepts. Automaton has 233831 states and 361969 transitions. Word has length 75 [2020-12-22 09:03:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:09,767 INFO L481 AbstractCegarLoop]: Abstraction has 233831 states and 361969 transitions. [2020-12-22 09:03:09,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:03:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 233831 states and 361969 transitions. [2020-12-22 09:03:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 09:03:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:09,771 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] [2020-12-22 09:03:09,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:03:09,771 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -805359648, now seen corresponding path program 1 times [2020-12-22 09:03:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:09,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863677425] [2020-12-22 09:03:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:09,810 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 09:03:09,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863677425] [2020-12-22 09:03:09,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:09,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:03:09,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406542797] [2020-12-22 09:03:09,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:03:09,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:09,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:03:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:03:09,813 INFO L87 Difference]: Start difference. First operand 233831 states and 361969 transitions. Second operand 3 states. [2020-12-22 09:03:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:39,266 INFO L93 Difference]: Finished difference Result 701341 states and 1085674 transitions. [2020-12-22 09:03:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:03:39,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 09:03:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:40,623 INFO L225 Difference]: With dead ends: 701341 [2020-12-22 09:03:40,623 INFO L226 Difference]: Without dead ends: 467601 [2020-12-22 09:03:40,909 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 09:03:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467601 states.