/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:27:42,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:27:42,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:27:42,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:27:42,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:27:42,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:27:42,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:27:42,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:27:42,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:27:42,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:27:42,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:27:42,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:27:42,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:27:42,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:27:42,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:27:42,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:27:42,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:27:42,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:27:42,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:27:42,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:27:42,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:27:42,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:27:42,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:27:42,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:27:42,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:27:42,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:27:42,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:27:42,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:27:42,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:27:42,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:27:42,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:27:42,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:27:42,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:27:42,410 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:27:42,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:27:42,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:27:42,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:27:42,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:27:42,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:27:42,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:27:42,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:27:42,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:27:42,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:27:42,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:27:42,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:27:42,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:27:42,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:27:42,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:27:42,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:27:42,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:27:42,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:27:42,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:27:42,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:27:42,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:27:42,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:27:42,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:27:42,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:27:42,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:27:42,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:27:42,850 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:27:42,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:27:42,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ec34e6b/500a42bab6d2445eae5311c7c35e9406/FLAGf7497c7be [2020-12-22 07:27:43,632 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:27:43,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:27:43,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ec34e6b/500a42bab6d2445eae5311c7c35e9406/FLAGf7497c7be [2020-12-22 07:27:43,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ec34e6b/500a42bab6d2445eae5311c7c35e9406 [2020-12-22 07:27:43,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:27:43,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:27:43,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:27:43,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:27:43,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:27:43,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:43" (1/1) ... [2020-12-22 07:27:43,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@372a4313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:43, skipping insertion in model container [2020-12-22 07:27:43,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:43" (1/1) ... [2020-12-22 07:27:43,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:27:43,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:27:44,200 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2020-12-22 07:27:44,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:27:44,217 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:27:44,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c[9392,9405] [2020-12-22 07:27:44,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:27:44,324 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:27:44,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44 WrapperNode [2020-12-22 07:27:44,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:27:44,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:27:44,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:27:44,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:27:44,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:27:44,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:27:44,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:27:44,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:27:44,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... [2020-12-22 07:27:44,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:27:44,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:27:44,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:27:44,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:27:44,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:27:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:27:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:27:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:27:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:27:45,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:27:45,532 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:27:45,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:45 BoogieIcfgContainer [2020-12-22 07:27:45,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:27:45,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:27:45,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:27:45,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:27:45,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:27:43" (1/3) ... [2020-12-22 07:27:45,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4fc624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:45, skipping insertion in model container [2020-12-22 07:27:45,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:44" (2/3) ... [2020-12-22 07:27:45,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4fc624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:45, skipping insertion in model container [2020-12-22 07:27:45,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:45" (3/3) ... [2020-12-22 07:27:45,545 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c [2020-12-22 07:27:45,552 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:27:45,558 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:27:45,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:27:45,608 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:27:45,608 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:27:45,608 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:27:45,608 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:27:45,608 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:27:45,608 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:27:45,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:27:45,609 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:27:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states. [2020-12-22 07:27:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:27:45,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:45,636 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] [2020-12-22 07:27:45,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2020-12-22 07:27:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:45,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673735859] [2020-12-22 07:27:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:45,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673735859] [2020-12-22 07:27:45,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:45,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:27:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714289748] [2020-12-22 07:27:45,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:27:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:27:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:27:45,922 INFO L87 Difference]: Start difference. First operand 100 states. Second operand 2 states. [2020-12-22 07:27:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:45,951 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2020-12-22 07:27:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:27:45,953 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-22 07:27:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:45,967 INFO L225 Difference]: With dead ends: 171 [2020-12-22 07:27:45,967 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 07:27:45,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:27:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 07:27:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 07:27:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 07:27:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2020-12-22 07:27:46,023 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2020-12-22 07:27:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:46,024 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2020-12-22 07:27:46,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:27:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2020-12-22 07:27:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 07:27:46,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:46,027 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] [2020-12-22 07:27:46,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:27:46,027 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2020-12-22 07:27:46,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:46,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180775889] [2020-12-22 07:27:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:46,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180775889] [2020-12-22 07:27:46,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:46,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:27:46,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577374417] [2020-12-22 07:27:46,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:27:46,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:27:46,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:27:46,197 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand 5 states. [2020-12-22 07:27:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:46,379 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2020-12-22 07:27:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:27:46,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 07:27:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:46,383 INFO L225 Difference]: With dead ends: 232 [2020-12-22 07:27:46,383 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 07:27:46,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:27:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 07:27:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2020-12-22 07:27:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 07:27:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-12-22 07:27:46,400 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2020-12-22 07:27:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:46,401 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-12-22 07:27:46,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:27:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-12-22 07:27:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:27:46,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:46,404 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] [2020-12-22 07:27:46,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:27:46,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2020-12-22 07:27:46,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:46,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592337420] [2020-12-22 07:27:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:46,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592337420] [2020-12-22 07:27:46,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:46,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:46,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262899717] [2020-12-22 07:27:46,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:46,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:46,634 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 3 states. [2020-12-22 07:27:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:46,674 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2020-12-22 07:27:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:46,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 07:27:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:46,678 INFO L225 Difference]: With dead ends: 216 [2020-12-22 07:27:46,678 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 07:27:46,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 07:27:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-12-22 07:27:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 07:27:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2020-12-22 07:27:46,712 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2020-12-22 07:27:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:46,713 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2020-12-22 07:27:46,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2020-12-22 07:27:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:27:46,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:46,718 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] [2020-12-22 07:27:46,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:27:46,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2020-12-22 07:27:46,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:46,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905279942] [2020-12-22 07:27:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:46,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905279942] [2020-12-22 07:27:46,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:46,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:46,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96554600] [2020-12-22 07:27:46,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:46,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:46,890 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand 3 states. [2020-12-22 07:27:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:46,956 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2020-12-22 07:27:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:46,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:27:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:46,966 INFO L225 Difference]: With dead ends: 360 [2020-12-22 07:27:46,966 INFO L226 Difference]: Without dead ends: 242 [2020-12-22 07:27:46,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-22 07:27:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2020-12-22 07:27:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-22 07:27:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2020-12-22 07:27:47,017 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2020-12-22 07:27:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:47,018 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2020-12-22 07:27:47,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2020-12-22 07:27:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:27:47,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:47,023 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] [2020-12-22 07:27:47,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:27:47,023 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2020-12-22 07:27:47,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:47,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279818280] [2020-12-22 07:27:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:47,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279818280] [2020-12-22 07:27:47,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:47,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832577093] [2020-12-22 07:27:47,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:47,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:47,196 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand 3 states. [2020-12-22 07:27:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:47,283 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2020-12-22 07:27:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:47,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 07:27:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:47,290 INFO L225 Difference]: With dead ends: 612 [2020-12-22 07:27:47,290 INFO L226 Difference]: Without dead ends: 402 [2020-12-22 07:27:47,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-22 07:27:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-12-22 07:27:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-22 07:27:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2020-12-22 07:27:47,329 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2020-12-22 07:27:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:47,329 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2020-12-22 07:27:47,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2020-12-22 07:27:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 07:27:47,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:47,331 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] [2020-12-22 07:27:47,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:27:47,332 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2020-12-22 07:27:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:47,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111100323] [2020-12-22 07:27:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111100323] [2020-12-22 07:27:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:47,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:47,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969262160] [2020-12-22 07:27:47,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:47,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:47,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:47,428 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand 3 states. [2020-12-22 07:27:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:47,512 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2020-12-22 07:27:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:47,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 07:27:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:47,522 INFO L225 Difference]: With dead ends: 1044 [2020-12-22 07:27:47,522 INFO L226 Difference]: Without dead ends: 674 [2020-12-22 07:27:47,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-12-22 07:27:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2020-12-22 07:27:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-12-22 07:27:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2020-12-22 07:27:47,561 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2020-12-22 07:27:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:47,562 INFO L481 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2020-12-22 07:27:47,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2020-12-22 07:27:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 07:27:47,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:47,563 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] [2020-12-22 07:27:47,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:27:47,564 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2020-12-22 07:27:47,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:47,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407448600] [2020-12-22 07:27:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:47,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407448600] [2020-12-22 07:27:47,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:47,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:27:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284369539] [2020-12-22 07:27:47,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:27:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:27:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:27:47,854 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand 6 states. [2020-12-22 07:27:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:48,101 INFO L93 Difference]: Finished difference Result 2952 states and 4499 transitions. [2020-12-22 07:27:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:27:48,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-22 07:27:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:48,117 INFO L225 Difference]: With dead ends: 2952 [2020-12-22 07:27:48,118 INFO L226 Difference]: Without dead ends: 2310 [2020-12-22 07:27:48,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:27:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-22 07:27:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2304. [2020-12-22 07:27:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-22 07:27:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3487 transitions. [2020-12-22 07:27:48,242 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3487 transitions. Word has length 56 [2020-12-22 07:27:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:48,242 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3487 transitions. [2020-12-22 07:27:48,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:27:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3487 transitions. [2020-12-22 07:27:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:27:48,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:48,247 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] [2020-12-22 07:27:48,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:27:48,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1031908864, now seen corresponding path program 1 times [2020-12-22 07:27:48,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992984535] [2020-12-22 07:27:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992984535] [2020-12-22 07:27:48,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:48,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:27:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838555181] [2020-12-22 07:27:48,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:27:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:27:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:27:48,410 INFO L87 Difference]: Start difference. First operand 2304 states and 3487 transitions. Second operand 6 states. [2020-12-22 07:27:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:48,917 INFO L93 Difference]: Finished difference Result 10426 states and 15844 transitions. [2020-12-22 07:27:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:27:48,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-22 07:27:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:48,966 INFO L225 Difference]: With dead ends: 10426 [2020-12-22 07:27:48,966 INFO L226 Difference]: Without dead ends: 8152 [2020-12-22 07:27:48,974 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 07:27:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2020-12-22 07:27:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 4576. [2020-12-22 07:27:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2020-12-22 07:27:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2020-12-22 07:27:49,325 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2020-12-22 07:27:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:49,327 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2020-12-22 07:27:49,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:27:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2020-12-22 07:27:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:27:49,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:49,330 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] [2020-12-22 07:27:49,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:27:49,330 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:49,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2020-12-22 07:27:49,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364338562] [2020-12-22 07:27:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:49,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364338562] [2020-12-22 07:27:49,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:49,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:27:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273281286] [2020-12-22 07:27:49,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:27:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:27:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:27:49,546 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand 8 states. [2020-12-22 07:27:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:50,323 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2020-12-22 07:27:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:27:50,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-22 07:27:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:50,374 INFO L225 Difference]: With dead ends: 9634 [2020-12-22 07:27:50,375 INFO L226 Difference]: Without dead ends: 9632 [2020-12-22 07:27:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:27:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2020-12-22 07:27:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2020-12-22 07:27:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4960 states. [2020-12-22 07:27:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2020-12-22 07:27:50,853 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2020-12-22 07:27:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:50,853 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2020-12-22 07:27:50,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:27:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2020-12-22 07:27:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 07:27:50,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:50,855 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] [2020-12-22 07:27:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:27:50,855 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2020-12-22 07:27:50,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:50,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546325784] [2020-12-22 07:27:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:50,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546325784] [2020-12-22 07:27:50,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:50,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:50,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72846706] [2020-12-22 07:27:50,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:50,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:50,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:50,942 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand 3 states. [2020-12-22 07:27:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:51,465 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2020-12-22 07:27:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:51,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 07:27:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:51,498 INFO L225 Difference]: With dead ends: 11966 [2020-12-22 07:27:51,499 INFO L226 Difference]: Without dead ends: 7036 [2020-12-22 07:27:51,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2020-12-22 07:27:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2020-12-22 07:27:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-12-22 07:27:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2020-12-22 07:27:51,992 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2020-12-22 07:27:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:51,992 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2020-12-22 07:27:51,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2020-12-22 07:27:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:27:51,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:51,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:51,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:27:51,999 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2020-12-22 07:27:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:52,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60395686] [2020-12-22 07:27:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60395686] [2020-12-22 07:27:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156340352] [2020-12-22 07:27:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:27:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:27:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:27:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:27:53,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:27:53,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2020-12-22 07:27:53,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919090147] [2020-12-22 07:27:53,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:27:53,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:27:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:27:53,062 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand 14 states. [2020-12-22 07:27:54,424 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-22 07:28:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:01,662 INFO L93 Difference]: Finished difference Result 59660 states and 85311 transitions. [2020-12-22 07:28:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 07:28:01,663 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-12-22 07:28:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:01,790 INFO L225 Difference]: With dead ends: 59660 [2020-12-22 07:28:01,791 INFO L226 Difference]: Without dead ends: 52658 [2020-12-22 07:28:01,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1111, Invalid=4741, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 07:28:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52658 states. [2020-12-22 07:28:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52658 to 25818. [2020-12-22 07:28:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25818 states. [2020-12-22 07:28:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25818 states to 25818 states and 36773 transitions. [2020-12-22 07:28:04,202 INFO L78 Accepts]: Start accepts. Automaton has 25818 states and 36773 transitions. Word has length 82 [2020-12-22 07:28:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:04,202 INFO L481 AbstractCegarLoop]: Abstraction has 25818 states and 36773 transitions. [2020-12-22 07:28:04,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:28:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25818 states and 36773 transitions. [2020-12-22 07:28:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:04,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:04,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:04,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 07:28:04,426 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2020-12-22 07:28:04,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:04,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436848583] [2020-12-22 07:28:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:04,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436848583] [2020-12-22 07:28:04,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:04,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:04,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226460495] [2020-12-22 07:28:04,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:04,492 INFO L87 Difference]: Start difference. First operand 25818 states and 36773 transitions. Second operand 3 states. [2020-12-22 07:28:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:06,242 INFO L93 Difference]: Finished difference Result 61578 states and 87635 transitions. [2020-12-22 07:28:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:06,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:28:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:06,337 INFO L225 Difference]: With dead ends: 61578 [2020-12-22 07:28:06,337 INFO L226 Difference]: Without dead ends: 40912 [2020-12-22 07:28:06,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40912 states. [2020-12-22 07:28:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40912 to 39254. [2020-12-22 07:28:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39254 states. [2020-12-22 07:28:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39254 states to 39254 states and 55297 transitions. [2020-12-22 07:28:08,626 INFO L78 Accepts]: Start accepts. Automaton has 39254 states and 55297 transitions. Word has length 83 [2020-12-22 07:28:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:08,626 INFO L481 AbstractCegarLoop]: Abstraction has 39254 states and 55297 transitions. [2020-12-22 07:28:08,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 39254 states and 55297 transitions. [2020-12-22 07:28:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:08,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:08,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:28:08,640 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1917030416, now seen corresponding path program 1 times [2020-12-22 07:28:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:08,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855043574] [2020-12-22 07:28:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:28:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855043574] [2020-12-22 07:28:08,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:08,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:28:08,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544948713] [2020-12-22 07:28:08,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:08,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:08,721 INFO L87 Difference]: Start difference. First operand 39254 states and 55297 transitions. Second operand 6 states. [2020-12-22 07:28:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:11,360 INFO L93 Difference]: Finished difference Result 96494 states and 136291 transitions. [2020-12-22 07:28:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:11,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:11,461 INFO L225 Difference]: With dead ends: 96494 [2020-12-22 07:28:11,461 INFO L226 Difference]: Without dead ends: 57279 [2020-12-22 07:28:11,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:28:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57279 states. [2020-12-22 07:28:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57279 to 49757. [2020-12-22 07:28:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49757 states. [2020-12-22 07:28:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49757 states to 49757 states and 69126 transitions. [2020-12-22 07:28:14,539 INFO L78 Accepts]: Start accepts. Automaton has 49757 states and 69126 transitions. Word has length 83 [2020-12-22 07:28:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:14,539 INFO L481 AbstractCegarLoop]: Abstraction has 49757 states and 69126 transitions. [2020-12-22 07:28:14,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 49757 states and 69126 transitions. [2020-12-22 07:28:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:14,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:14,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:14,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:28:14,554 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash 396113720, now seen corresponding path program 1 times [2020-12-22 07:28:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:14,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569981674] [2020-12-22 07:28:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569981674] [2020-12-22 07:28:14,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:14,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:14,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595756591] [2020-12-22 07:28:14,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:14,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:14,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:14,744 INFO L87 Difference]: Start difference. First operand 49757 states and 69126 transitions. Second operand 3 states. [2020-12-22 07:28:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:17,724 INFO L93 Difference]: Finished difference Result 110761 states and 153968 transitions. [2020-12-22 07:28:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:17,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:28:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:17,826 INFO L225 Difference]: With dead ends: 110761 [2020-12-22 07:28:17,827 INFO L226 Difference]: Without dead ends: 65647 [2020-12-22 07:28:17,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2020-12-22 07:28:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 56769. [2020-12-22 07:28:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56769 states. [2020-12-22 07:28:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56769 states to 56769 states and 78114 transitions. [2020-12-22 07:28:20,837 INFO L78 Accepts]: Start accepts. Automaton has 56769 states and 78114 transitions. Word has length 83 [2020-12-22 07:28:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:20,838 INFO L481 AbstractCegarLoop]: Abstraction has 56769 states and 78114 transitions. [2020-12-22 07:28:20,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56769 states and 78114 transitions. [2020-12-22 07:28:20,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:20,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:20,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:20,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:28:20,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2020-12-22 07:28:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:20,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953990465] [2020-12-22 07:28:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:28:20,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953990465] [2020-12-22 07:28:20,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:20,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:20,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574534230] [2020-12-22 07:28:20,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:20,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:20,960 INFO L87 Difference]: Start difference. First operand 56769 states and 78114 transitions. Second operand 6 states. [2020-12-22 07:28:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:25,600 INFO L93 Difference]: Finished difference Result 116567 states and 161599 transitions. [2020-12-22 07:28:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:25,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:25,727 INFO L225 Difference]: With dead ends: 116567 [2020-12-22 07:28:25,727 INFO L226 Difference]: Without dead ends: 105509 [2020-12-22 07:28:25,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:28:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105509 states. [2020-12-22 07:28:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105509 to 67345. [2020-12-22 07:28:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67345 states. [2020-12-22 07:28:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67345 states to 67345 states and 92546 transitions. [2020-12-22 07:28:29,725 INFO L78 Accepts]: Start accepts. Automaton has 67345 states and 92546 transitions. Word has length 83 [2020-12-22 07:28:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:29,726 INFO L481 AbstractCegarLoop]: Abstraction has 67345 states and 92546 transitions. [2020-12-22 07:28:29,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 67345 states and 92546 transitions. [2020-12-22 07:28:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:29,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:29,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:29,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:28:29,737 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:29,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1106415528, now seen corresponding path program 1 times [2020-12-22 07:28:29,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242700526] [2020-12-22 07:28:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:29,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242700526] [2020-12-22 07:28:29,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:29,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:29,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822978393] [2020-12-22 07:28:29,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:29,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:29,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:29,791 INFO L87 Difference]: Start difference. First operand 67345 states and 92546 transitions. Second operand 3 states. [2020-12-22 07:28:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:34,866 INFO L93 Difference]: Finished difference Result 155405 states and 212137 transitions. [2020-12-22 07:28:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:34,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:28:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:34,984 INFO L225 Difference]: With dead ends: 155405 [2020-12-22 07:28:34,984 INFO L226 Difference]: Without dead ends: 102715 [2020-12-22 07:28:35,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102715 states. [2020-12-22 07:28:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102715 to 98709. [2020-12-22 07:28:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98709 states. [2020-12-22 07:28:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98709 states to 98709 states and 133335 transitions. [2020-12-22 07:28:40,490 INFO L78 Accepts]: Start accepts. Automaton has 98709 states and 133335 transitions. Word has length 83 [2020-12-22 07:28:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:40,490 INFO L481 AbstractCegarLoop]: Abstraction has 98709 states and 133335 transitions. [2020-12-22 07:28:40,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 98709 states and 133335 transitions. [2020-12-22 07:28:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:40,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:40,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:28:40,504 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2020-12-22 07:28:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:40,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630981387] [2020-12-22 07:28:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:28:40,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630981387] [2020-12-22 07:28:40,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:40,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89904306] [2020-12-22 07:28:40,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:40,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:40,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:40,599 INFO L87 Difference]: Start difference. First operand 98709 states and 133335 transitions. Second operand 6 states. [2020-12-22 07:28:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:49,739 INFO L93 Difference]: Finished difference Result 204929 states and 279286 transitions. [2020-12-22 07:28:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:49,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:50,102 INFO L225 Difference]: With dead ends: 204929 [2020-12-22 07:28:50,102 INFO L226 Difference]: Without dead ends: 173343 [2020-12-22 07:28:50,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:28:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173343 states. [2020-12-22 07:28:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173343 to 128853. [2020-12-22 07:28:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128853 states. [2020-12-22 07:28:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128853 states to 128853 states and 173895 transitions. [2020-12-22 07:28:57,710 INFO L78 Accepts]: Start accepts. Automaton has 128853 states and 173895 transitions. Word has length 83 [2020-12-22 07:28:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:57,710 INFO L481 AbstractCegarLoop]: Abstraction has 128853 states and 173895 transitions. [2020-12-22 07:28:57,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 128853 states and 173895 transitions. [2020-12-22 07:28:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:57,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:57,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:57,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:28:57,727 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1007327224, now seen corresponding path program 1 times [2020-12-22 07:28:57,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:57,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859755803] [2020-12-22 07:28:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:28:57,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859755803] [2020-12-22 07:28:57,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:57,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79320756] [2020-12-22 07:28:57,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:57,816 INFO L87 Difference]: Start difference. First operand 128853 states and 173895 transitions. Second operand 6 states. [2020-12-22 07:29:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:08,309 INFO L93 Difference]: Finished difference Result 240865 states and 327962 transitions. [2020-12-22 07:29:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:29:08,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:29:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:08,751 INFO L225 Difference]: With dead ends: 240865 [2020-12-22 07:29:08,751 INFO L226 Difference]: Without dead ends: 203247 [2020-12-22 07:29:08,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:29:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203247 states. [2020-12-22 07:29:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203247 to 157535. [2020-12-22 07:29:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157535 states. [2020-12-22 07:29:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157535 states to 157535 states and 212841 transitions. [2020-12-22 07:29:18,248 INFO L78 Accepts]: Start accepts. Automaton has 157535 states and 212841 transitions. Word has length 83 [2020-12-22 07:29:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:18,250 INFO L481 AbstractCegarLoop]: Abstraction has 157535 states and 212841 transitions. [2020-12-22 07:29:18,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:29:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 157535 states and 212841 transitions. [2020-12-22 07:29:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:29:18,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:18,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:18,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:29:18,263 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -548102794, now seen corresponding path program 1 times [2020-12-22 07:29:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:18,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816590973] [2020-12-22 07:29:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:29:18,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816590973] [2020-12-22 07:29:18,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:18,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:29:18,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443952884] [2020-12-22 07:29:18,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:29:18,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:29:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:29:18,367 INFO L87 Difference]: Start difference. First operand 157535 states and 212841 transitions. Second operand 6 states. [2020-12-22 07:29:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:30,121 INFO L93 Difference]: Finished difference Result 249853 states and 339938 transitions. [2020-12-22 07:29:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:29:30,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-22 07:29:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:30,624 INFO L225 Difference]: With dead ends: 249853 [2020-12-22 07:29:30,625 INFO L226 Difference]: Without dead ends: 226067 [2020-12-22 07:29:30,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:29:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226067 states. [2020-12-22 07:29:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226067 to 174245. [2020-12-22 07:29:40,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174245 states. [2020-12-22 07:29:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174245 states to 174245 states and 235679 transitions. [2020-12-22 07:29:41,347 INFO L78 Accepts]: Start accepts. Automaton has 174245 states and 235679 transitions. Word has length 84 [2020-12-22 07:29:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:41,348 INFO L481 AbstractCegarLoop]: Abstraction has 174245 states and 235679 transitions. [2020-12-22 07:29:41,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:29:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 174245 states and 235679 transitions. [2020-12-22 07:29:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:29:41,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:41,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:41,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:29:41,368 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1864221152, now seen corresponding path program 1 times [2020-12-22 07:29:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:41,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014875213] [2020-12-22 07:29:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:41,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014875213] [2020-12-22 07:29:41,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:41,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186630198] [2020-12-22 07:29:41,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:41,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:41,453 INFO L87 Difference]: Start difference. First operand 174245 states and 235679 transitions. Second operand 3 states. [2020-12-22 07:29:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:52,716 INFO L93 Difference]: Finished difference Result 304033 states and 408358 transitions. [2020-12-22 07:29:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:52,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 07:29:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:53,163 INFO L225 Difference]: With dead ends: 304033 [2020-12-22 07:29:53,163 INFO L226 Difference]: Without dead ends: 180070 [2020-12-22 07:29:53,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180070 states.