/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.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:27:49,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:27:49,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:27:49,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:27:49,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:27:49,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:27:49,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:27:49,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:27:49,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:27:49,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:27:49,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:27:49,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:27:49,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:27:49,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:27:49,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:27:49,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:27:49,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:27:49,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:27:49,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:27:49,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:27:49,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:27:49,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:27:49,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:27:49,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:27:49,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:27:49,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:27:49,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:27:49,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:27:49,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:27:49,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:27:49,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:27:49,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:27:49,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:27:49,744 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:27:49,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:27:49,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:27:49,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:27:49,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:27:49,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:27:49,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:27:49,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:27:49,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:27:49,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:27:49,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:27:49,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:27:49,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:27:49,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:27:49,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:27:49,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:27:49,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:27:49,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:27:49,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:27:49,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:27:49,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:27:49,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:27:50,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:27:50,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:27:50,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:27:50,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:27:50,218 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:27:50,220 INFO L432 ainManager$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.UNBOUNDED.pals.c [2020-12-22 07:27:50,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970bc22fb/5828af793ecd48009578773cc801fd8b/FLAG8b7233333 [2020-12-22 07:27:51,043 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:27:51,044 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:27:51,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970bc22fb/5828af793ecd48009578773cc801fd8b/FLAG8b7233333 [2020-12-22 07:27:51,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970bc22fb/5828af793ecd48009578773cc801fd8b [2020-12-22 07:27:51,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:27:51,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:27:51,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:27:51,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:27:51,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:27:51,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296b5a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51, skipping insertion in model container [2020-12-22 07:27:51,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:27:51,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:27:51,674 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.UNBOUNDED.pals.c[9488,9501] [2020-12-22 07:27:51,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:27:51,691 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:27:51,748 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.UNBOUNDED.pals.c[9488,9501] [2020-12-22 07:27:51,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:27:51,776 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:27:51,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51 WrapperNode [2020-12-22 07:27:51,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:27:51,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:27:51,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:27:51,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:27:51,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:27:51,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:27:51,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:27:51,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:27:51,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (1/1) ... [2020-12-22 07:27:51,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:27:51,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:27:51,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:27:51,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:27:51,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (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 07:27:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:27:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:27:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:27:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:27:52,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:27:52,832 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:27:52,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:52 BoogieIcfgContainer [2020-12-22 07:27:52,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:27:52,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:27:52,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:27:52,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:27:52,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:27:51" (1/3) ... [2020-12-22 07:27:52,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b957ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:52, skipping insertion in model container [2020-12-22 07:27:52,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:51" (2/3) ... [2020-12-22 07:27:52,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b957ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:52, skipping insertion in model container [2020-12-22 07:27:52,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:52" (3/3) ... [2020-12-22 07:27:52,846 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2020-12-22 07:27:52,853 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:27:52,858 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:27:52,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:27:52,921 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:27:52,921 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:27:52,921 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:27:52,925 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:27:52,925 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:27:52,925 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:27:52,926 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:27:52,926 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:27:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-12-22 07:27:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 07:27:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:52,955 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] [2020-12-22 07:27:52,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2020-12-22 07:27:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:52,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530680142] [2020-12-22 07:27:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:53,238 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 07:27:53,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530680142] [2020-12-22 07:27:53,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:53,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:27:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597853759] [2020-12-22 07:27:53,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:27:53,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:53,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:27:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:27:53,264 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 2 states. [2020-12-22 07:27:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:53,305 INFO L93 Difference]: Finished difference Result 169 states and 279 transitions. [2020-12-22 07:27:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:27:53,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 07:27:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:53,318 INFO L225 Difference]: With dead ends: 169 [2020-12-22 07:27:53,319 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 07:27:53,322 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 07:27:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 07:27:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 07:27:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 07:27:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 161 transitions. [2020-12-22 07:27:53,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 161 transitions. Word has length 30 [2020-12-22 07:27:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:53,374 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 161 transitions. [2020-12-22 07:27:53,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:27:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 161 transitions. [2020-12-22 07:27:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 07:27:53,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:53,377 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] [2020-12-22 07:27:53,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:27:53,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2020-12-22 07:27:53,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:53,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987034725] [2020-12-22 07:27:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:53,574 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 07:27:53,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987034725] [2020-12-22 07:27:53,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:53,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:27:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635920293] [2020-12-22 07:27:53,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:27:53,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:27:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:27:53,582 INFO L87 Difference]: Start difference. First operand 97 states and 161 transitions. Second operand 5 states. [2020-12-22 07:27:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:53,747 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2020-12-22 07:27:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:27:53,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 07:27:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:53,754 INFO L225 Difference]: With dead ends: 168 [2020-12-22 07:27:53,754 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 07:27:53,758 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 07:27:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 07:27:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 07:27:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 07:27:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2020-12-22 07:27:53,780 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 30 [2020-12-22 07:27:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:53,781 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2020-12-22 07:27:53,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:27:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2020-12-22 07:27:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 07:27:53,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:53,788 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 07:27:53,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:27:53,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:53,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2020-12-22 07:27:53,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:53,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101899553] [2020-12-22 07:27:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:54,009 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 07:27:54,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101899553] [2020-12-22 07:27:54,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:54,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:54,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586144251] [2020-12-22 07:27:54,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:54,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:54,013 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand 3 states. [2020-12-22 07:27:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:54,039 INFO L93 Difference]: Finished difference Result 219 states and 331 transitions. [2020-12-22 07:27:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:54,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 07:27:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:54,042 INFO L225 Difference]: With dead ends: 219 [2020-12-22 07:27:54,042 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 07:27:54,043 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 07:27:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 07:27:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-12-22 07:27:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 07:27:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2020-12-22 07:27:54,058 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 53 [2020-12-22 07:27:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:54,059 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2020-12-22 07:27:54,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2020-12-22 07:27:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 07:27:54,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:54,061 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 07:27:54,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:27:54,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:54,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2020-12-22 07:27:54,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:54,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371707527] [2020-12-22 07:27:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:54,144 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 07:27:54,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371707527] [2020-12-22 07:27:54,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:54,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184569839] [2020-12-22 07:27:54,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:54,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:54,148 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand 3 states. [2020-12-22 07:27:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:54,177 INFO L93 Difference]: Finished difference Result 366 states and 566 transitions. [2020-12-22 07:27:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:54,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 07:27:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:54,181 INFO L225 Difference]: With dead ends: 366 [2020-12-22 07:27:54,182 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 07:27:54,183 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 07:27:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 07:27:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-12-22 07:27:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-22 07:27:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 371 transitions. [2020-12-22 07:27:54,228 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 371 transitions. Word has length 54 [2020-12-22 07:27:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:54,229 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 371 transitions. [2020-12-22 07:27:54,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 371 transitions. [2020-12-22 07:27:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 07:27:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:54,232 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 07:27:54,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:27:54,232 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2020-12-22 07:27:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:54,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97265485] [2020-12-22 07:27:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:54,377 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 07:27:54,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97265485] [2020-12-22 07:27:54,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:54,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:54,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353010189] [2020-12-22 07:27:54,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:54,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:54,384 INFO L87 Difference]: Start difference. First operand 244 states and 371 transitions. Second operand 3 states. [2020-12-22 07:27:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:54,447 INFO L93 Difference]: Finished difference Result 624 states and 973 transitions. [2020-12-22 07:27:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:54,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 07:27:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:54,452 INFO L225 Difference]: With dead ends: 624 [2020-12-22 07:27:54,453 INFO L226 Difference]: Without dead ends: 410 [2020-12-22 07:27:54,459 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 07:27:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-22 07:27:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-12-22 07:27:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-22 07:27:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 627 transitions. [2020-12-22 07:27:54,511 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 627 transitions. Word has length 55 [2020-12-22 07:27:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:54,512 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 627 transitions. [2020-12-22 07:27:54,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 627 transitions. [2020-12-22 07:27:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 07:27:54,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:54,516 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 07:27:54,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:27:54,516 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2020-12-22 07:27:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:54,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896122521] [2020-12-22 07:27:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:54,695 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 07:27:54,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896122521] [2020-12-22 07:27:54,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:54,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:27:54,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53565677] [2020-12-22 07:27:54,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:27:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:27:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:27:54,698 INFO L87 Difference]: Start difference. First operand 408 states and 627 transitions. Second operand 6 states. [2020-12-22 07:27:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:54,843 INFO L93 Difference]: Finished difference Result 1764 states and 2747 transitions. [2020-12-22 07:27:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:27:54,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-22 07:27:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:54,853 INFO L225 Difference]: With dead ends: 1764 [2020-12-22 07:27:54,853 INFO L226 Difference]: Without dead ends: 1386 [2020-12-22 07:27:54,855 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 07:27:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-12-22 07:27:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1380. [2020-12-22 07:27:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1380 states. [2020-12-22 07:27:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2139 transitions. [2020-12-22 07:27:54,919 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2139 transitions. Word has length 56 [2020-12-22 07:27:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:54,920 INFO L481 AbstractCegarLoop]: Abstraction has 1380 states and 2139 transitions. [2020-12-22 07:27:54,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:27:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2139 transitions. [2020-12-22 07:27:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:27:54,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:54,921 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 07:27:54,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:27:54,922 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2107679122, now seen corresponding path program 1 times [2020-12-22 07:27:54,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:54,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327839629] [2020-12-22 07:27:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:54,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327839629] [2020-12-22 07:27:54,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:54,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:54,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631137257] [2020-12-22 07:27:54,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:54,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:54,988 INFO L87 Difference]: Start difference. First operand 1380 states and 2139 transitions. Second operand 3 states. [2020-12-22 07:27:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:55,080 INFO L93 Difference]: Finished difference Result 3656 states and 5661 transitions. [2020-12-22 07:27:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:55,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 07:27:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:55,094 INFO L225 Difference]: With dead ends: 3656 [2020-12-22 07:27:55,094 INFO L226 Difference]: Without dead ends: 2306 [2020-12-22 07:27:55,097 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 07:27:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2020-12-22 07:27:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2304. [2020-12-22 07:27:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-22 07:27:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3519 transitions. [2020-12-22 07:27:55,205 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3519 transitions. Word has length 57 [2020-12-22 07:27:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:55,205 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3519 transitions. [2020-12-22 07:27:55,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3519 transitions. [2020-12-22 07:27:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:27:55,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:55,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:27:55,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:27:55,207 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash 903862406, now seen corresponding path program 1 times [2020-12-22 07:27:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:55,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151305841] [2020-12-22 07:27:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:55,293 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 07:27:55,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151305841] [2020-12-22 07:27:55,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:55,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:27:55,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343006116] [2020-12-22 07:27:55,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:27:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:27:55,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:27:55,296 INFO L87 Difference]: Start difference. First operand 2304 states and 3519 transitions. Second operand 6 states. [2020-12-22 07:27:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:55,747 INFO L93 Difference]: Finished difference Result 10426 states and 15988 transitions. [2020-12-22 07:27:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:27:55,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-22 07:27:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:55,791 INFO L225 Difference]: With dead ends: 10426 [2020-12-22 07:27:55,791 INFO L226 Difference]: Without dead ends: 8152 [2020-12-22 07:27:55,800 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 07:27:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2020-12-22 07:27:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 4576. [2020-12-22 07:27:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2020-12-22 07:27:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6879 transitions. [2020-12-22 07:27:56,199 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6879 transitions. Word has length 57 [2020-12-22 07:27:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:56,199 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6879 transitions. [2020-12-22 07:27:56,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:27:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6879 transitions. [2020-12-22 07:27:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:27:56,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:56,201 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 07:27:56,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:27:56,201 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2020-12-22 07:27:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:56,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442391657] [2020-12-22 07:27:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442391657] [2020-12-22 07:27:56,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:56,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:27:56,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089707516] [2020-12-22 07:27:56,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:27:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:27:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:27:56,294 INFO L87 Difference]: Start difference. First operand 4576 states and 6879 transitions. Second operand 8 states. [2020-12-22 07:27:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:56,916 INFO L93 Difference]: Finished difference Result 9634 states and 14240 transitions. [2020-12-22 07:27:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:27:56,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-22 07:27:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:56,964 INFO L225 Difference]: With dead ends: 9634 [2020-12-22 07:27:56,964 INFO L226 Difference]: Without dead ends: 9632 [2020-12-22 07:27:56,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:27:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2020-12-22 07:27:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2020-12-22 07:27:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4960 states. [2020-12-22 07:27:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7263 transitions. [2020-12-22 07:27:57,373 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7263 transitions. Word has length 58 [2020-12-22 07:27:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:57,373 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states and 7263 transitions. [2020-12-22 07:27:57,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:27:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7263 transitions. [2020-12-22 07:27:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 07:27:57,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:57,374 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 07:27:57,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:27:57,375 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2020-12-22 07:27:57,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:57,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052847357] [2020-12-22 07:27:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:57,426 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 07:27:57,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052847357] [2020-12-22 07:27:57,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:27:57,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:27:57,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365715632] [2020-12-22 07:27:57,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:27:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:27:57,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:27:57,429 INFO L87 Difference]: Start difference. First operand 4960 states and 7263 transitions. Second operand 3 states. [2020-12-22 07:27:57,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:27:57,819 INFO L93 Difference]: Finished difference Result 12022 states and 17635 transitions. [2020-12-22 07:27:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:27:57,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 07:27:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:27:57,855 INFO L225 Difference]: With dead ends: 12022 [2020-12-22 07:27:57,855 INFO L226 Difference]: Without dead ends: 7092 [2020-12-22 07:27:57,862 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 07:27:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2020-12-22 07:27:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7034. [2020-12-22 07:27:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-12-22 07:27:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10233 transitions. [2020-12-22 07:27:58,340 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10233 transitions. Word has length 59 [2020-12-22 07:27:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:27:58,340 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10233 transitions. [2020-12-22 07:27:58,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:27:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10233 transitions. [2020-12-22 07:27:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:27:58,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:27:58,346 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, 1] [2020-12-22 07:27:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:27:58,347 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:27:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:27:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1751499669, now seen corresponding path program 1 times [2020-12-22 07:27:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:27:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844987640] [2020-12-22 07:27:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:27:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:27:58,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844987640] [2020-12-22 07:27:58,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406843078] [2020-12-22 07:27:58,583 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 07:27:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:27:58,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:27:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:27:59,006 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 07:27:59,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:27:59,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:27:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36455375] [2020-12-22 07:27:59,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:27:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:27:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:27:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:27:59,009 INFO L87 Difference]: Start difference. First operand 7034 states and 10233 transitions. Second operand 12 states. [2020-12-22 07:28:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:04,929 INFO L93 Difference]: Finished difference Result 53516 states and 77163 transitions. [2020-12-22 07:28:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 07:28:04,930 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-22 07:28:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:05,032 INFO L225 Difference]: With dead ends: 53516 [2020-12-22 07:28:05,032 INFO L226 Difference]: Without dead ends: 46762 [2020-12-22 07:28:05,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=728, Invalid=3054, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 07:28:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46762 states. [2020-12-22 07:28:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46762 to 27022. [2020-12-22 07:28:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27022 states. [2020-12-22 07:28:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27022 states to 27022 states and 38871 transitions. [2020-12-22 07:28:07,300 INFO L78 Accepts]: Start accepts. Automaton has 27022 states and 38871 transitions. Word has length 83 [2020-12-22 07:28:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:07,300 INFO L481 AbstractCegarLoop]: Abstraction has 27022 states and 38871 transitions. [2020-12-22 07:28:07,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:28:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27022 states and 38871 transitions. [2020-12-22 07:28:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:07,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:07,309 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:07,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 07:28:07,524 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1216959876, now seen corresponding path program 1 times [2020-12-22 07:28:07,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:07,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803653165] [2020-12-22 07:28:07,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:07,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803653165] [2020-12-22 07:28:07,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:07,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:07,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206041263] [2020-12-22 07:28:07,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:07,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:07,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:07,602 INFO L87 Difference]: Start difference. First operand 27022 states and 38871 transitions. Second operand 3 states. [2020-12-22 07:28:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:09,105 INFO L93 Difference]: Finished difference Result 52398 states and 75377 transitions. [2020-12-22 07:28:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:09,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:28:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:09,182 INFO L225 Difference]: With dead ends: 52398 [2020-12-22 07:28:09,182 INFO L226 Difference]: Without dead ends: 37234 [2020-12-22 07:28:09,213 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 07:28:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37234 states. [2020-12-22 07:28:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37234 to 34890. [2020-12-22 07:28:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34890 states. [2020-12-22 07:28:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34890 states to 34890 states and 49605 transitions. [2020-12-22 07:28:11,140 INFO L78 Accepts]: Start accepts. Automaton has 34890 states and 49605 transitions. Word has length 83 [2020-12-22 07:28:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:11,140 INFO L481 AbstractCegarLoop]: Abstraction has 34890 states and 49605 transitions. [2020-12-22 07:28:11,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34890 states and 49605 transitions. [2020-12-22 07:28:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:11,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:11,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:11,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:28:11,164 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1156984558, now seen corresponding path program 1 times [2020-12-22 07:28:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:11,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509247237] [2020-12-22 07:28:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:28:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509247237] [2020-12-22 07:28:11,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:11,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:11,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920647963] [2020-12-22 07:28:11,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:11,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:11,279 INFO L87 Difference]: Start difference. First operand 34890 states and 49605 transitions. Second operand 6 states. [2020-12-22 07:28:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:14,238 INFO L93 Difference]: Finished difference Result 80458 states and 115254 transitions. [2020-12-22 07:28:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:14,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:14,368 INFO L225 Difference]: With dead ends: 80458 [2020-12-22 07:28:14,368 INFO L226 Difference]: Without dead ends: 65120 [2020-12-22 07:28:14,408 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 07:28:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65120 states. [2020-12-22 07:28:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65120 to 48690. [2020-12-22 07:28:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48690 states. [2020-12-22 07:28:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48690 states to 48690 states and 69199 transitions. [2020-12-22 07:28:17,220 INFO L78 Accepts]: Start accepts. Automaton has 48690 states and 69199 transitions. Word has length 83 [2020-12-22 07:28:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:17,220 INFO L481 AbstractCegarLoop]: Abstraction has 48690 states and 69199 transitions. [2020-12-22 07:28:17,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 48690 states and 69199 transitions. [2020-12-22 07:28:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:17,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:17,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:17,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:28:17,232 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 103872526, now seen corresponding path program 1 times [2020-12-22 07:28:17,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:17,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346777081] [2020-12-22 07:28:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:28:17,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346777081] [2020-12-22 07:28:17,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:17,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155702342] [2020-12-22 07:28:17,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:17,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:17,286 INFO L87 Difference]: Start difference. First operand 48690 states and 69199 transitions. Second operand 3 states. [2020-12-22 07:28:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:19,821 INFO L93 Difference]: Finished difference Result 78601 states and 111237 transitions. [2020-12-22 07:28:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:19,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 07:28:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:19,922 INFO L225 Difference]: With dead ends: 78601 [2020-12-22 07:28:19,922 INFO L226 Difference]: Without dead ends: 50714 [2020-12-22 07:28:19,971 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 07:28:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2020-12-22 07:28:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 48532. [2020-12-22 07:28:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48532 states. [2020-12-22 07:28:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48532 states to 48532 states and 67794 transitions. [2020-12-22 07:28:22,657 INFO L78 Accepts]: Start accepts. Automaton has 48532 states and 67794 transitions. Word has length 83 [2020-12-22 07:28:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:22,657 INFO L481 AbstractCegarLoop]: Abstraction has 48532 states and 67794 transitions. [2020-12-22 07:28:22,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 48532 states and 67794 transitions. [2020-12-22 07:28:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:22,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:22,667 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:22,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:28:22,668 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1847168790, now seen corresponding path program 1 times [2020-12-22 07:28:22,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:22,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842145914] [2020-12-22 07:28:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:28:22,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842145914] [2020-12-22 07:28:22,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:22,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111222422] [2020-12-22 07:28:22,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:22,759 INFO L87 Difference]: Start difference. First operand 48532 states and 67794 transitions. Second operand 6 states. [2020-12-22 07:28:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:26,225 INFO L93 Difference]: Finished difference Result 90213 states and 127312 transitions. [2020-12-22 07:28:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:26,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:26,337 INFO L225 Difference]: With dead ends: 90213 [2020-12-22 07:28:26,337 INFO L226 Difference]: Without dead ends: 78791 [2020-12-22 07:28:26,361 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 07:28:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78791 states. [2020-12-22 07:28:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78791 to 59428. [2020-12-22 07:28:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59428 states. [2020-12-22 07:28:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59428 states to 59428 states and 83148 transitions. [2020-12-22 07:28:29,663 INFO L78 Accepts]: Start accepts. Automaton has 59428 states and 83148 transitions. Word has length 83 [2020-12-22 07:28:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:29,663 INFO L481 AbstractCegarLoop]: Abstraction has 59428 states and 83148 transitions. [2020-12-22 07:28:29,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 59428 states and 83148 transitions. [2020-12-22 07:28:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:28:29,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:29,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:28:29,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:28:29,674 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 591755980, now seen corresponding path program 1 times [2020-12-22 07:28:29,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:29,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250660058] [2020-12-22 07:28:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:28:29,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250660058] [2020-12-22 07:28:29,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:29,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:28:29,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766616739] [2020-12-22 07:28:29,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:29,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:29,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:29,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:29,785 INFO L87 Difference]: Start difference. First operand 59428 states and 83148 transitions. Second operand 6 states. [2020-12-22 07:28:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:33,667 INFO L93 Difference]: Finished difference Result 93685 states and 132050 transitions. [2020-12-22 07:28:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:28:33,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 07:28:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:33,748 INFO L225 Difference]: With dead ends: 93685 [2020-12-22 07:28:33,748 INFO L226 Difference]: Without dead ends: 86075 [2020-12-22 07:28:33,764 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 07:28:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86075 states. [2020-12-22 07:28:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86075 to 66712. [2020-12-22 07:28:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66712 states. [2020-12-22 07:28:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66712 states to 66712 states and 93442 transitions. [2020-12-22 07:28:37,082 INFO L78 Accepts]: Start accepts. Automaton has 66712 states and 93442 transitions. Word has length 83 [2020-12-22 07:28:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:37,082 INFO L481 AbstractCegarLoop]: Abstraction has 66712 states and 93442 transitions. [2020-12-22 07:28:37,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:28:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 66712 states and 93442 transitions. [2020-12-22 07:28:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:28:37,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:37,090 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 07:28:37,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:28:37,090 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1488535284, now seen corresponding path program 1 times [2020-12-22 07:28:37,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:37,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747171528] [2020-12-22 07:28:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:37,140 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 07:28:37,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747171528] [2020-12-22 07:28:37,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:37,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:28:37,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971917951] [2020-12-22 07:28:37,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:28:37,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:37,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:28:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:28:37,142 INFO L87 Difference]: Start difference. First operand 66712 states and 93442 transitions. Second operand 3 states. [2020-12-22 07:28:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:28:43,567 INFO L93 Difference]: Finished difference Result 183967 states and 256544 transitions. [2020-12-22 07:28:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:28:43,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 07:28:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:28:43,719 INFO L225 Difference]: With dead ends: 183967 [2020-12-22 07:28:43,719 INFO L226 Difference]: Without dead ends: 122108 [2020-12-22 07:28:43,763 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 07:28:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122108 states. [2020-12-22 07:28:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122108 to 121968. [2020-12-22 07:28:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121968 states. [2020-12-22 07:28:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121968 states to 121968 states and 168000 transitions. [2020-12-22 07:28:50,213 INFO L78 Accepts]: Start accepts. Automaton has 121968 states and 168000 transitions. Word has length 84 [2020-12-22 07:28:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:28:50,213 INFO L481 AbstractCegarLoop]: Abstraction has 121968 states and 168000 transitions. [2020-12-22 07:28:50,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:28:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 121968 states and 168000 transitions. [2020-12-22 07:28:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:28:50,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:28:50,226 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 07:28:50,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:28:50,226 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:28:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:28:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash -663169506, now seen corresponding path program 1 times [2020-12-22 07:28:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:28:50,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166047459] [2020-12-22 07:28:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:28:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:28:50,514 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 07:28:50,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166047459] [2020-12-22 07:28:50,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:28:50,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:28:50,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046484574] [2020-12-22 07:28:50,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:28:50,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:28:50,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:28:50,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:28:50,520 INFO L87 Difference]: Start difference. First operand 121968 states and 168000 transitions. Second operand 6 states. [2020-12-22 07:29:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:00,546 INFO L93 Difference]: Finished difference Result 312492 states and 430482 transitions. [2020-12-22 07:29:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:29:00,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-22 07:29:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:00,868 INFO L225 Difference]: With dead ends: 312492 [2020-12-22 07:29:00,868 INFO L226 Difference]: Without dead ends: 190560 [2020-12-22 07:29:00,956 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 07:29:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190560 states. [2020-12-22 07:29:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190560 to 167002. [2020-12-22 07:29:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167002 states. [2020-12-22 07:29:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167002 states to 167002 states and 227792 transitions. [2020-12-22 07:29:10,794 INFO L78 Accepts]: Start accepts. Automaton has 167002 states and 227792 transitions. Word has length 84 [2020-12-22 07:29:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:10,794 INFO L481 AbstractCegarLoop]: Abstraction has 167002 states and 227792 transitions. [2020-12-22 07:29:10,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:29:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 167002 states and 227792 transitions. [2020-12-22 07:29:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:29:10,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:10,810 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 07:29:10,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:29:10,810 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1365416604, now seen corresponding path program 1 times [2020-12-22 07:29:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:10,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150234691] [2020-12-22 07:29:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:10,917 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 07:29:10,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150234691] [2020-12-22 07:29:10,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:10,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:29:10,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357637723] [2020-12-22 07:29:10,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:29:10,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:29:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:29:10,919 INFO L87 Difference]: Start difference. First operand 167002 states and 227792 transitions. Second operand 6 states. [2020-12-22 07:29:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:23,050 INFO L93 Difference]: Finished difference Result 258213 states and 355174 transitions. [2020-12-22 07:29:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:29:23,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-22 07:29:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:23,490 INFO L225 Difference]: With dead ends: 258213 [2020-12-22 07:29:23,491 INFO L226 Difference]: Without dead ends: 232325 [2020-12-22 07:29:23,557 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 07:29:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232325 states. [2020-12-22 07:29:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232325 to 188634. [2020-12-22 07:29:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188634 states. [2020-12-22 07:29:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188634 states to 188634 states and 257301 transitions. [2020-12-22 07:29:35,377 INFO L78 Accepts]: Start accepts. Automaton has 188634 states and 257301 transitions. Word has length 84 [2020-12-22 07:29:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:29:35,378 INFO L481 AbstractCegarLoop]: Abstraction has 188634 states and 257301 transitions. [2020-12-22 07:29:35,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:29:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 188634 states and 257301 transitions. [2020-12-22 07:29:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:29:35,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:29:35,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:29:35,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:29:35,395 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:29:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:29:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 335470307, now seen corresponding path program 1 times [2020-12-22 07:29:35,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:29:35,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390994671] [2020-12-22 07:29:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:29:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:29:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:29:35,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390994671] [2020-12-22 07:29:35,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:29:35,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:29:35,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195094898] [2020-12-22 07:29:35,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:29:35,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:29:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:29:35,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:29:35,470 INFO L87 Difference]: Start difference. First operand 188634 states and 257301 transitions. Second operand 3 states. [2020-12-22 07:29:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:29:53,653 INFO L93 Difference]: Finished difference Result 491003 states and 666677 transitions. [2020-12-22 07:29:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:29:53,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 07:29:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:29:54,388 INFO L225 Difference]: With dead ends: 491003 [2020-12-22 07:29:54,389 INFO L226 Difference]: Without dead ends: 306369 [2020-12-22 07:29:54,621 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 07:29:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306369 states.