/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.5.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:34:07,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:34:07,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:34:07,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:34:07,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:34:07,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:34:07,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:34:07,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:34:07,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:34:07,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:34:07,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:34:07,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:34:07,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:34:07,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:34:07,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:34:07,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:34:07,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:34:07,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:34:07,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:34:07,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:34:07,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:34:07,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:34:07,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:34:07,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:34:07,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:34:07,617 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:34:07,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:34:07,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:34:07,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:34:07,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:34:07,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:34:07,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:34:07,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:34:07,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:34:07,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:34:07,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:34:07,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:34:07,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:34:07,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:34:07,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:34:07,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:34:07,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:34:07,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:34:07,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:34:07,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:34:07,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:34:07,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:34:08,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:34:08,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:34:08,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:34:08,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:34:08,062 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:34:08,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:08,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c1571df/2420c88f74f843ec8ecb0c9faa22b988/FLAGcb7c8e784 [2020-12-22 07:34:08,841 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:34:08,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:08,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c1571df/2420c88f74f843ec8ecb0c9faa22b988/FLAGcb7c8e784 [2020-12-22 07:34:09,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c1571df/2420c88f74f843ec8ecb0c9faa22b988 [2020-12-22 07:34:09,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:34:09,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:34:09,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:34:09,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:34:09,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:34:09,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396a6cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09, skipping insertion in model container [2020-12-22 07:34:09,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:34:09,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:34:09,541 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.5.ufo.UNBOUNDED.pals.c[11261,11274] [2020-12-22 07:34:09,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:34:09,558 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:34:09,616 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.5.ufo.UNBOUNDED.pals.c[11261,11274] [2020-12-22 07:34:09,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:34:09,640 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:34:09,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09 WrapperNode [2020-12-22 07:34:09,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:34:09,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:34:09,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:34:09,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:34:09,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:34:09,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:34:09,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:34:09,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:34:09,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (1/1) ... [2020-12-22 07:34:09,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:34:09,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:34:09,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:34:09,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:34:09,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (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 07:34:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:34:09,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:34:09,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:34:09,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:34:10,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:34:10,938 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:34:10,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:34:10 BoogieIcfgContainer [2020-12-22 07:34:10,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:34:10,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:34:10,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:34:10,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:34:10,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:34:09" (1/3) ... [2020-12-22 07:34:10,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61beaf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:34:10, skipping insertion in model container [2020-12-22 07:34:10,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:34:09" (2/3) ... [2020-12-22 07:34:10,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61beaf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:34:10, skipping insertion in model container [2020-12-22 07:34:10,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:34:10" (3/3) ... [2020-12-22 07:34:10,950 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:34:10,957 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:34:10,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:34:10,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:34:11,006 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:34:11,006 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:34:11,007 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:34:11,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:34:11,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:34:11,007 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:34:11,007 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:34:11,007 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:34:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-12-22 07:34:11,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:34:11,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:11,035 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] [2020-12-22 07:34:11,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash -176333024, now seen corresponding path program 1 times [2020-12-22 07:34:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:11,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104617637] [2020-12-22 07:34:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:11,279 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 07:34:11,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104617637] [2020-12-22 07:34:11,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:11,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:34:11,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298252576] [2020-12-22 07:34:11,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:34:11,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:34:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:34:11,306 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 2 states. [2020-12-22 07:34:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:11,354 INFO L93 Difference]: Finished difference Result 148 states and 247 transitions. [2020-12-22 07:34:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:34:11,356 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2020-12-22 07:34:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:11,389 INFO L225 Difference]: With dead ends: 148 [2020-12-22 07:34:11,391 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 07:34:11,396 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 07:34:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 07:34:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 07:34:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 07:34:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 152 transitions. [2020-12-22 07:34:11,456 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 152 transitions. Word has length 33 [2020-12-22 07:34:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:11,457 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 152 transitions. [2020-12-22 07:34:11,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:34:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 152 transitions. [2020-12-22 07:34:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 07:34:11,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:11,459 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] [2020-12-22 07:34:11,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:34:11,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash -685806114, now seen corresponding path program 1 times [2020-12-22 07:34:11,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:11,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404936180] [2020-12-22 07:34:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:11,614 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 07:34:11,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404936180] [2020-12-22 07:34:11,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:11,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:34:11,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298973621] [2020-12-22 07:34:11,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:34:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:11,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:34:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:34:11,620 INFO L87 Difference]: Start difference. First operand 90 states and 152 transitions. Second operand 5 states. [2020-12-22 07:34:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:11,792 INFO L93 Difference]: Finished difference Result 147 states and 240 transitions. [2020-12-22 07:34:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:34:11,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 07:34:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:11,798 INFO L225 Difference]: With dead ends: 147 [2020-12-22 07:34:11,798 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 07:34:11,800 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 07:34:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 07:34:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 07:34:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 07:34:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2020-12-22 07:34:11,820 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 33 [2020-12-22 07:34:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:11,821 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2020-12-22 07:34:11,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:34:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2020-12-22 07:34:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:11,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:11,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:11,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:34:11,828 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash 803903125, now seen corresponding path program 1 times [2020-12-22 07:34:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:11,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073119629] [2020-12-22 07:34:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:12,119 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 07:34:12,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073119629] [2020-12-22 07:34:12,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:12,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:12,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695791496] [2020-12-22 07:34:12,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:12,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:12,123 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 3 states. [2020-12-22 07:34:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:12,169 INFO L93 Difference]: Finished difference Result 190 states and 279 transitions. [2020-12-22 07:34:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:12,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:12,173 INFO L225 Difference]: With dead ends: 190 [2020-12-22 07:34:12,173 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 07:34:12,174 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 07:34:12,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 07:34:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-12-22 07:34:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 07:34:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2020-12-22 07:34:12,198 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 63 [2020-12-22 07:34:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2020-12-22 07:34:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2020-12-22 07:34:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:12,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:12,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:12,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:34:12,203 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1136127733, now seen corresponding path program 1 times [2020-12-22 07:34:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:12,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952982001] [2020-12-22 07:34:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:12,401 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 07:34:12,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952982001] [2020-12-22 07:34:12,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:12,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:12,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569601321] [2020-12-22 07:34:12,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:12,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:12,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:12,405 INFO L87 Difference]: Start difference. First operand 135 states and 193 transitions. Second operand 3 states. [2020-12-22 07:34:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:12,435 INFO L93 Difference]: Finished difference Result 319 states and 485 transitions. [2020-12-22 07:34:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:12,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:34:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:12,438 INFO L225 Difference]: With dead ends: 319 [2020-12-22 07:34:12,439 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 07:34:12,440 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 07:34:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 07:34:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-12-22 07:34:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 07:34:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 326 transitions. [2020-12-22 07:34:12,477 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 326 transitions. Word has length 63 [2020-12-22 07:34:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:12,478 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 326 transitions. [2020-12-22 07:34:12,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 326 transitions. [2020-12-22 07:34:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:34:12,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:12,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:12,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:34:12,480 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1564554881, now seen corresponding path program 1 times [2020-12-22 07:34:12,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:12,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051257865] [2020-12-22 07:34:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:12,633 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 07:34:12,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051257865] [2020-12-22 07:34:12,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:12,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:12,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176644162] [2020-12-22 07:34:12,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:12,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:12,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:12,636 INFO L87 Difference]: Start difference. First operand 219 states and 326 transitions. Second operand 7 states. [2020-12-22 07:34:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:12,963 INFO L93 Difference]: Finished difference Result 2039 states and 3216 transitions. [2020-12-22 07:34:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:34:12,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-12-22 07:34:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:12,975 INFO L225 Difference]: With dead ends: 2039 [2020-12-22 07:34:12,975 INFO L226 Difference]: Without dead ends: 1857 [2020-12-22 07:34:12,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:34:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2020-12-22 07:34:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 399. [2020-12-22 07:34:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-22 07:34:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 606 transitions. [2020-12-22 07:34:13,026 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 606 transitions. Word has length 63 [2020-12-22 07:34:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:13,026 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 606 transitions. [2020-12-22 07:34:13,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 606 transitions. [2020-12-22 07:34:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:34:13,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:13,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:13,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:34:13,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:13,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1117008495, now seen corresponding path program 1 times [2020-12-22 07:34:13,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:13,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699899064] [2020-12-22 07:34:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:13,170 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 07:34:13,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699899064] [2020-12-22 07:34:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617557070] [2020-12-22 07:34:13,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:13,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:13,174 INFO L87 Difference]: Start difference. First operand 399 states and 606 transitions. Second operand 3 states. [2020-12-22 07:34:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:13,247 INFO L93 Difference]: Finished difference Result 1079 states and 1668 transitions. [2020-12-22 07:34:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:13,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:34:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:13,252 INFO L225 Difference]: With dead ends: 1079 [2020-12-22 07:34:13,252 INFO L226 Difference]: Without dead ends: 717 [2020-12-22 07:34:13,254 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 07:34:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2020-12-22 07:34:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 707. [2020-12-22 07:34:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-12-22 07:34:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1070 transitions. [2020-12-22 07:34:13,296 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1070 transitions. Word has length 65 [2020-12-22 07:34:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:13,296 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 1070 transitions. [2020-12-22 07:34:13,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1070 transitions. [2020-12-22 07:34:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:34:13,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:13,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:13,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:34:13,299 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1050514983, now seen corresponding path program 1 times [2020-12-22 07:34:13,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:13,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10984158] [2020-12-22 07:34:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:13,653 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 07:34:13,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10984158] [2020-12-22 07:34:13,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:13,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:13,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042992113] [2020-12-22 07:34:13,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:13,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:13,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:13,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:13,657 INFO L87 Difference]: Start difference. First operand 707 states and 1070 transitions. Second operand 7 states. [2020-12-22 07:34:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:13,877 INFO L93 Difference]: Finished difference Result 1379 states and 2104 transitions. [2020-12-22 07:34:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:13,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 07:34:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:13,883 INFO L225 Difference]: With dead ends: 1379 [2020-12-22 07:34:13,883 INFO L226 Difference]: Without dead ends: 709 [2020-12-22 07:34:13,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:34:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-12-22 07:34:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 707. [2020-12-22 07:34:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-12-22 07:34:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1062 transitions. [2020-12-22 07:34:13,930 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1062 transitions. Word has length 65 [2020-12-22 07:34:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:13,930 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 1062 transitions. [2020-12-22 07:34:13,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1062 transitions. [2020-12-22 07:34:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:34:13,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:13,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:13,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:34:13,932 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 738399093, now seen corresponding path program 1 times [2020-12-22 07:34:13,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:13,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026363480] [2020-12-22 07:34:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:14,038 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 07:34:14,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026363480] [2020-12-22 07:34:14,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135893079] [2020-12-22 07:34:14,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:14,041 INFO L87 Difference]: Start difference. First operand 707 states and 1062 transitions. Second operand 3 states. [2020-12-22 07:34:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:14,122 INFO L93 Difference]: Finished difference Result 1951 states and 2952 transitions. [2020-12-22 07:34:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:14,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:34:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:14,130 INFO L225 Difference]: With dead ends: 1951 [2020-12-22 07:34:14,130 INFO L226 Difference]: Without dead ends: 1281 [2020-12-22 07:34:14,132 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 07:34:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-22 07:34:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1279. [2020-12-22 07:34:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2020-12-22 07:34:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1910 transitions. [2020-12-22 07:34:14,218 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1910 transitions. Word has length 65 [2020-12-22 07:34:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:14,219 INFO L481 AbstractCegarLoop]: Abstraction has 1279 states and 1910 transitions. [2020-12-22 07:34:14,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1910 transitions. [2020-12-22 07:34:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:34:14,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:14,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:14,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:34:14,221 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1985906709, now seen corresponding path program 1 times [2020-12-22 07:34:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:14,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321790] [2020-12-22 07:34:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:14,285 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 07:34:14,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321790] [2020-12-22 07:34:14,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:14,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:14,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137635080] [2020-12-22 07:34:14,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:14,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:14,293 INFO L87 Difference]: Start difference. First operand 1279 states and 1910 transitions. Second operand 3 states. [2020-12-22 07:34:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:14,448 INFO L93 Difference]: Finished difference Result 3571 states and 5336 transitions. [2020-12-22 07:34:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:14,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:34:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:14,463 INFO L225 Difference]: With dead ends: 3571 [2020-12-22 07:34:14,463 INFO L226 Difference]: Without dead ends: 2329 [2020-12-22 07:34:14,466 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 07:34:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2020-12-22 07:34:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2327. [2020-12-22 07:34:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2327 states. [2020-12-22 07:34:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3430 transitions. [2020-12-22 07:34:14,668 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3430 transitions. Word has length 65 [2020-12-22 07:34:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:14,668 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 3430 transitions. [2020-12-22 07:34:14,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3430 transitions. [2020-12-22 07:34:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:34:14,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:14,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:14,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:34:14,670 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1379050855, now seen corresponding path program 1 times [2020-12-22 07:34:14,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:14,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945371693] [2020-12-22 07:34:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:14,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945371693] [2020-12-22 07:34:14,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:14,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:34:14,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104978880] [2020-12-22 07:34:14,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:34:14,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:14,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:34:14,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:34:14,813 INFO L87 Difference]: Start difference. First operand 2327 states and 3430 transitions. Second operand 8 states. [2020-12-22 07:34:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:15,265 INFO L93 Difference]: Finished difference Result 4053 states and 5932 transitions. [2020-12-22 07:34:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:34:15,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-12-22 07:34:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:15,293 INFO L225 Difference]: With dead ends: 4053 [2020-12-22 07:34:15,293 INFO L226 Difference]: Without dead ends: 4051 [2020-12-22 07:34:15,298 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 07:34:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2020-12-22 07:34:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2423. [2020-12-22 07:34:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-12-22 07:34:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 3510 transitions. [2020-12-22 07:34:15,548 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 3510 transitions. Word has length 66 [2020-12-22 07:34:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:15,548 INFO L481 AbstractCegarLoop]: Abstraction has 2423 states and 3510 transitions. [2020-12-22 07:34:15,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:34:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 3510 transitions. [2020-12-22 07:34:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:34:15,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:15,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:15,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:34:15,550 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1091422096, now seen corresponding path program 1 times [2020-12-22 07:34:15,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:15,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103960524] [2020-12-22 07:34:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:15,624 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 07:34:15,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103960524] [2020-12-22 07:34:15,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:15,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:15,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500559501] [2020-12-22 07:34:15,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:15,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:15,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:15,631 INFO L87 Difference]: Start difference. First operand 2423 states and 3510 transitions. Second operand 3 states. [2020-12-22 07:34:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:15,903 INFO L93 Difference]: Finished difference Result 4862 states and 7100 transitions. [2020-12-22 07:34:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:15,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:34:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:15,924 INFO L225 Difference]: With dead ends: 4862 [2020-12-22 07:34:15,924 INFO L226 Difference]: Without dead ends: 3515 [2020-12-22 07:34:15,927 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 07:34:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-12-22 07:34:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3513. [2020-12-22 07:34:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3513 states. [2020-12-22 07:34:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5064 transitions. [2020-12-22 07:34:16,251 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5064 transitions. Word has length 67 [2020-12-22 07:34:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:16,252 INFO L481 AbstractCegarLoop]: Abstraction has 3513 states and 5064 transitions. [2020-12-22 07:34:16,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5064 transitions. [2020-12-22 07:34:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:34:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:16,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2020-12-22 07:34:16,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:34:16,257 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash 639422196, now seen corresponding path program 1 times [2020-12-22 07:34:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:16,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444119011] [2020-12-22 07:34:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:34:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444119011] [2020-12-22 07:34:16,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:16,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:16,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131740172] [2020-12-22 07:34:16,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:16,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:16,444 INFO L87 Difference]: Start difference. First operand 3513 states and 5064 transitions. Second operand 7 states. [2020-12-22 07:34:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:17,806 INFO L93 Difference]: Finished difference Result 21589 states and 31166 transitions. [2020-12-22 07:34:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:17,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:34:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:17,884 INFO L225 Difference]: With dead ends: 21589 [2020-12-22 07:34:17,884 INFO L226 Difference]: Without dead ends: 18115 [2020-12-22 07:34:17,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2020-12-22 07:34:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 6985. [2020-12-22 07:34:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6985 states. [2020-12-22 07:34:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 10040 transitions. [2020-12-22 07:34:18,698 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 10040 transitions. Word has length 93 [2020-12-22 07:34:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:18,698 INFO L481 AbstractCegarLoop]: Abstraction has 6985 states and 10040 transitions. [2020-12-22 07:34:18,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 10040 transitions. [2020-12-22 07:34:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:34:18,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:18,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2020-12-22 07:34:18,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:34:18,704 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:18,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1886929812, now seen corresponding path program 1 times [2020-12-22 07:34:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:18,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179571167] [2020-12-22 07:34:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:34:18,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179571167] [2020-12-22 07:34:18,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:18,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179880572] [2020-12-22 07:34:18,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:18,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:18,857 INFO L87 Difference]: Start difference. First operand 6985 states and 10040 transitions. Second operand 7 states. [2020-12-22 07:34:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:20,505 INFO L93 Difference]: Finished difference Result 25061 states and 36142 transitions. [2020-12-22 07:34:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:20,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:34:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:20,561 INFO L225 Difference]: With dead ends: 25061 [2020-12-22 07:34:20,561 INFO L226 Difference]: Without dead ends: 21587 [2020-12-22 07:34:20,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21587 states. [2020-12-22 07:34:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21587 to 12201. [2020-12-22 07:34:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12201 states. [2020-12-22 07:34:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 17464 transitions. [2020-12-22 07:34:21,609 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 17464 transitions. Word has length 93 [2020-12-22 07:34:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:21,609 INFO L481 AbstractCegarLoop]: Abstraction has 12201 states and 17464 transitions. [2020-12-22 07:34:21,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 17464 transitions. [2020-12-22 07:34:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:34:21,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:21,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-12-22 07:34:21,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:34:21,615 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:21,615 INFO L82 PathProgramCache]: Analyzing trace with hash -938604502, now seen corresponding path program 1 times [2020-12-22 07:34:21,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:21,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563393905] [2020-12-22 07:34:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:34:21,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563393905] [2020-12-22 07:34:21,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:21,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328945808] [2020-12-22 07:34:21,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:21,748 INFO L87 Difference]: Start difference. First operand 12201 states and 17464 transitions. Second operand 7 states. [2020-12-22 07:34:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:23,297 INFO L93 Difference]: Finished difference Result 28533 states and 41118 transitions. [2020-12-22 07:34:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:23,298 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:34:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:23,368 INFO L225 Difference]: With dead ends: 28533 [2020-12-22 07:34:23,368 INFO L226 Difference]: Without dead ends: 25059 [2020-12-22 07:34:23,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25059 states. [2020-12-22 07:34:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25059 to 15673. [2020-12-22 07:34:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15673 states. [2020-12-22 07:34:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 22440 transitions. [2020-12-22 07:34:24,646 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 22440 transitions. Word has length 93 [2020-12-22 07:34:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:24,647 INFO L481 AbstractCegarLoop]: Abstraction has 15673 states and 22440 transitions. [2020-12-22 07:34:24,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 22440 transitions. [2020-12-22 07:34:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 07:34:24,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:24,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-12-22 07:34:24,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:34:24,653 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2120903754, now seen corresponding path program 1 times [2020-12-22 07:34:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:24,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321260188] [2020-12-22 07:34:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:34:24,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321260188] [2020-12-22 07:34:24,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:24,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:24,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423245196] [2020-12-22 07:34:24,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:24,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:24,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:24,779 INFO L87 Difference]: Start difference. First operand 15673 states and 22440 transitions. Second operand 7 states. [2020-12-22 07:34:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:26,330 INFO L93 Difference]: Finished difference Result 32005 states and 46094 transitions. [2020-12-22 07:34:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:26,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-12-22 07:34:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:26,395 INFO L225 Difference]: With dead ends: 32005 [2020-12-22 07:34:26,395 INFO L226 Difference]: Without dead ends: 28531 [2020-12-22 07:34:26,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28531 states. [2020-12-22 07:34:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28531 to 19145. [2020-12-22 07:34:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19145 states. [2020-12-22 07:34:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 27416 transitions. [2020-12-22 07:34:27,589 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 27416 transitions. Word has length 93 [2020-12-22 07:34:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:27,590 INFO L481 AbstractCegarLoop]: Abstraction has 19145 states and 27416 transitions. [2020-12-22 07:34:27,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 27416 transitions. [2020-12-22 07:34:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 07:34:27,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:27,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1] [2020-12-22 07:34:27,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:34:27,596 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1312606543, now seen corresponding path program 1 times [2020-12-22 07:34:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:27,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753699693] [2020-12-22 07:34:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:34:27,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753699693] [2020-12-22 07:34:27,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:27,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:34:27,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749755598] [2020-12-22 07:34:27,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:34:27,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:34:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:34:27,718 INFO L87 Difference]: Start difference. First operand 19145 states and 27416 transitions. Second operand 7 states. [2020-12-22 07:34:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:29,782 INFO L93 Difference]: Finished difference Result 33397 states and 48126 transitions. [2020-12-22 07:34:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:34:29,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 07:34:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:29,863 INFO L225 Difference]: With dead ends: 33397 [2020-12-22 07:34:29,863 INFO L226 Difference]: Without dead ends: 30963 [2020-12-22 07:34:29,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:34:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2020-12-22 07:34:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 21577. [2020-12-22 07:34:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21577 states. [2020-12-22 07:34:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 30936 transitions. [2020-12-22 07:34:31,487 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 30936 transitions. Word has length 95 [2020-12-22 07:34:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:31,487 INFO L481 AbstractCegarLoop]: Abstraction has 21577 states and 30936 transitions. [2020-12-22 07:34:31,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:34:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 30936 transitions. [2020-12-22 07:34:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 07:34:31,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:31,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2020-12-22 07:34:31,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:34:31,495 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1044794996, now seen corresponding path program 1 times [2020-12-22 07:34:31,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:31,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560253320] [2020-12-22 07:34:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:31,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560253320] [2020-12-22 07:34:31,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:31,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:31,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870478527] [2020-12-22 07:34:31,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:31,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:31,660 INFO L87 Difference]: Start difference. First operand 21577 states and 30936 transitions. Second operand 3 states. [2020-12-22 07:34:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:32,937 INFO L93 Difference]: Finished difference Result 37418 states and 53853 transitions. [2020-12-22 07:34:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:32,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 07:34:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:32,960 INFO L225 Difference]: With dead ends: 37418 [2020-12-22 07:34:32,960 INFO L226 Difference]: Without dead ends: 15880 [2020-12-22 07:34:32,990 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 07:34:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15880 states. [2020-12-22 07:34:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15880 to 15878. [2020-12-22 07:34:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15878 states. [2020-12-22 07:34:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15878 states to 15878 states and 22746 transitions. [2020-12-22 07:34:34,039 INFO L78 Accepts]: Start accepts. Automaton has 15878 states and 22746 transitions. Word has length 95 [2020-12-22 07:34:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:34,040 INFO L481 AbstractCegarLoop]: Abstraction has 15878 states and 22746 transitions. [2020-12-22 07:34:34,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15878 states and 22746 transitions. [2020-12-22 07:34:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 07:34:34,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:34,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2020-12-22 07:34:34,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:34:34,046 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1472221374, now seen corresponding path program 1 times [2020-12-22 07:34:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:34,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902090575] [2020-12-22 07:34:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:34,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902090575] [2020-12-22 07:34:34,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:34,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:34,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040458038] [2020-12-22 07:34:34,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:34,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:34,108 INFO L87 Difference]: Start difference. First operand 15878 states and 22746 transitions. Second operand 3 states. [2020-12-22 07:34:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:34,596 INFO L93 Difference]: Finished difference Result 23786 states and 34084 transitions. [2020-12-22 07:34:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:34,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 07:34:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:34,608 INFO L225 Difference]: With dead ends: 23786 [2020-12-22 07:34:34,609 INFO L226 Difference]: Without dead ends: 7976 [2020-12-22 07:34:34,625 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 07:34:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2020-12-22 07:34:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 7974. [2020-12-22 07:34:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7974 states. [2020-12-22 07:34:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11306 transitions. [2020-12-22 07:34:35,363 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11306 transitions. Word has length 96 [2020-12-22 07:34:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:35,364 INFO L481 AbstractCegarLoop]: Abstraction has 7974 states and 11306 transitions. [2020-12-22 07:34:35,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11306 transitions. [2020-12-22 07:34:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 07:34:35,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:35,368 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:35,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:34:35,368 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1559340168, now seen corresponding path program 1 times [2020-12-22 07:34:35,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:35,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989092018] [2020-12-22 07:34:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:35,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989092018] [2020-12-22 07:34:35,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:34:35,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:34:35,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960422991] [2020-12-22 07:34:35,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:34:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:34:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:34:35,445 INFO L87 Difference]: Start difference. First operand 7974 states and 11306 transitions. Second operand 3 states. [2020-12-22 07:34:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:35,900 INFO L93 Difference]: Finished difference Result 11930 states and 16924 transitions. [2020-12-22 07:34:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:34:35,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 07:34:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:35,908 INFO L225 Difference]: With dead ends: 11930 [2020-12-22 07:34:35,908 INFO L226 Difference]: Without dead ends: 4024 [2020-12-22 07:34:35,920 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 07:34:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4024 states. [2020-12-22 07:34:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 4022. [2020-12-22 07:34:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2020-12-22 07:34:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5638 transitions. [2020-12-22 07:34:36,276 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5638 transitions. Word has length 96 [2020-12-22 07:34:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:36,276 INFO L481 AbstractCegarLoop]: Abstraction has 4022 states and 5638 transitions. [2020-12-22 07:34:36,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:34:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5638 transitions. [2020-12-22 07:34:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 07:34:36,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:36,279 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:34:36,279 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1616351918, now seen corresponding path program 1 times [2020-12-22 07:34:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:36,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689889430] [2020-12-22 07:34:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:36,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689889430] [2020-12-22 07:34:36,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48503446] [2020-12-22 07:34:36,522 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 07:34:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:34:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:34:37,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:34:37,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:34:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605039877] [2020-12-22 07:34:37,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:34:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:37,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:34:37,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:34:37,137 INFO L87 Difference]: Start difference. First operand 4022 states and 5638 transitions. Second operand 12 states. [2020-12-22 07:34:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:42,391 INFO L93 Difference]: Finished difference Result 28565 states and 39385 transitions. [2020-12-22 07:34:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 07:34:42,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2020-12-22 07:34:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:42,436 INFO L225 Difference]: With dead ends: 28565 [2020-12-22 07:34:42,436 INFO L226 Difference]: Without dead ends: 24611 [2020-12-22 07:34:42,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=525, Invalid=2025, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 07:34:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24611 states. [2020-12-22 07:34:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24611 to 13689. [2020-12-22 07:34:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13689 states. [2020-12-22 07:34:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13689 states to 13689 states and 18621 transitions. [2020-12-22 07:34:43,978 INFO L78 Accepts]: Start accepts. Automaton has 13689 states and 18621 transitions. Word has length 96 [2020-12-22 07:34:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:34:43,979 INFO L481 AbstractCegarLoop]: Abstraction has 13689 states and 18621 transitions. [2020-12-22 07:34:43,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:34:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 13689 states and 18621 transitions. [2020-12-22 07:34:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:34:43,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:34:43,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:34:44,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:34:44,184 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:34:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:34:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1720158323, now seen corresponding path program 1 times [2020-12-22 07:34:44,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:34:44,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800317979] [2020-12-22 07:34:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:34:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800317979] [2020-12-22 07:34:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168697593] [2020-12-22 07:34:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:34:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:34:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:34:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:34:44,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:34:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:34:45,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:34:45,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:34:45,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784631836] [2020-12-22 07:34:45,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:34:45,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:34:45,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:34:45,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:34:45,127 INFO L87 Difference]: Start difference. First operand 13689 states and 18621 transitions. Second operand 17 states. [2020-12-22 07:34:58,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:34:58,660 INFO L93 Difference]: Finished difference Result 133696 states and 182309 transitions. [2020-12-22 07:34:58,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 07:34:58,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 07:34:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:34:59,003 INFO L225 Difference]: With dead ends: 133696 [2020-12-22 07:34:59,003 INFO L226 Difference]: Without dead ends: 120725 [2020-12-22 07:34:59,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=660, Invalid=3000, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 07:34:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120725 states. [2020-12-22 07:35:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120725 to 68616. [2020-12-22 07:35:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68616 states. [2020-12-22 07:35:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68616 states to 68616 states and 91683 transitions. [2020-12-22 07:35:06,281 INFO L78 Accepts]: Start accepts. Automaton has 68616 states and 91683 transitions. Word has length 97 [2020-12-22 07:35:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:06,281 INFO L481 AbstractCegarLoop]: Abstraction has 68616 states and 91683 transitions. [2020-12-22 07:35:06,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:35:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 68616 states and 91683 transitions. [2020-12-22 07:35:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:35:06,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:06,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:06,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:35:06,489 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1760600483, now seen corresponding path program 1 times [2020-12-22 07:35:06,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:06,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121823988] [2020-12-22 07:35:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:06,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121823988] [2020-12-22 07:35:06,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:06,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:06,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002285151] [2020-12-22 07:35:06,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:06,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:06,555 INFO L87 Difference]: Start difference. First operand 68616 states and 91683 transitions. Second operand 3 states. [2020-12-22 07:35:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:10,257 INFO L93 Difference]: Finished difference Result 99700 states and 133238 transitions. [2020-12-22 07:35:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:10,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 07:35:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:10,310 INFO L225 Difference]: With dead ends: 99700 [2020-12-22 07:35:10,310 INFO L226 Difference]: Without dead ends: 35921 [2020-12-22 07:35:10,344 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 07:35:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35921 states. [2020-12-22 07:35:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35921 to 35589. [2020-12-22 07:35:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35589 states. [2020-12-22 07:35:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35589 states to 35589 states and 46617 transitions. [2020-12-22 07:35:14,025 INFO L78 Accepts]: Start accepts. Automaton has 35589 states and 46617 transitions. Word has length 97 [2020-12-22 07:35:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:14,025 INFO L481 AbstractCegarLoop]: Abstraction has 35589 states and 46617 transitions. [2020-12-22 07:35:14,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35589 states and 46617 transitions. [2020-12-22 07:35:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:35:14,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:14,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:14,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:35:14,027 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:14,028 INFO L82 PathProgramCache]: Analyzing trace with hash -58471165, now seen corresponding path program 1 times [2020-12-22 07:35:14,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:14,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549574633] [2020-12-22 07:35:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:14,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549574633] [2020-12-22 07:35:14,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:14,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028787520] [2020-12-22 07:35:14,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:14,085 INFO L87 Difference]: Start difference. First operand 35589 states and 46617 transitions. Second operand 3 states. [2020-12-22 07:35:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:16,379 INFO L93 Difference]: Finished difference Result 54733 states and 71876 transitions. [2020-12-22 07:35:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:16,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 07:35:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:16,405 INFO L225 Difference]: With dead ends: 54733 [2020-12-22 07:35:16,405 INFO L226 Difference]: Without dead ends: 23283 [2020-12-22 07:35:16,424 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 07:35:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23283 states. [2020-12-22 07:35:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23283 to 23281. [2020-12-22 07:35:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23281 states. [2020-12-22 07:35:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23281 states to 23281 states and 29853 transitions. [2020-12-22 07:35:18,673 INFO L78 Accepts]: Start accepts. Automaton has 23281 states and 29853 transitions. Word has length 97 [2020-12-22 07:35:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:18,673 INFO L481 AbstractCegarLoop]: Abstraction has 23281 states and 29853 transitions. [2020-12-22 07:35:18,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23281 states and 29853 transitions. [2020-12-22 07:35:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:35:18,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:18,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:18,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:35:18,675 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash 320648747, now seen corresponding path program 1 times [2020-12-22 07:35:18,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:18,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107954199] [2020-12-22 07:35:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:35:18,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107954199] [2020-12-22 07:35:18,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:18,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303470290] [2020-12-22 07:35:18,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:35:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:35:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:35:18,759 INFO L87 Difference]: Start difference. First operand 23281 states and 29853 transitions. Second operand 6 states. [2020-12-22 07:35:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:21,077 INFO L93 Difference]: Finished difference Result 43036 states and 55354 transitions. [2020-12-22 07:35:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:21,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-22 07:35:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:21,100 INFO L225 Difference]: With dead ends: 43036 [2020-12-22 07:35:21,100 INFO L226 Difference]: Without dead ends: 19907 [2020-12-22 07:35:21,113 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 07:35:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19907 states. [2020-12-22 07:35:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19907 to 19907. [2020-12-22 07:35:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19907 states. [2020-12-22 07:35:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19907 states to 19907 states and 25238 transitions. [2020-12-22 07:35:23,109 INFO L78 Accepts]: Start accepts. Automaton has 19907 states and 25238 transitions. Word has length 97 [2020-12-22 07:35:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:23,110 INFO L481 AbstractCegarLoop]: Abstraction has 19907 states and 25238 transitions. [2020-12-22 07:35:23,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:35:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19907 states and 25238 transitions. [2020-12-22 07:35:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:35:23,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:23,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:23,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:35:23,111 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash -64063125, now seen corresponding path program 1 times [2020-12-22 07:35:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:23,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144644252] [2020-12-22 07:35:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:35:23,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144644252] [2020-12-22 07:35:23,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:23,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:23,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084328609] [2020-12-22 07:35:23,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:35:23,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:23,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:35:23,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:35:23,194 INFO L87 Difference]: Start difference. First operand 19907 states and 25238 transitions. Second operand 6 states. [2020-12-22 07:35:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:24,783 INFO L93 Difference]: Finished difference Result 34697 states and 44160 transitions. [2020-12-22 07:35:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:24,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-22 07:35:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:24,799 INFO L225 Difference]: With dead ends: 34697 [2020-12-22 07:35:24,799 INFO L226 Difference]: Without dead ends: 14960 [2020-12-22 07:35:24,809 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 07:35:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14960 states. [2020-12-22 07:35:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14960 to 14960. [2020-12-22 07:35:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14960 states. [2020-12-22 07:35:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14960 states to 14960 states and 18830 transitions. [2020-12-22 07:35:26,417 INFO L78 Accepts]: Start accepts. Automaton has 14960 states and 18830 transitions. Word has length 97 [2020-12-22 07:35:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:26,418 INFO L481 AbstractCegarLoop]: Abstraction has 14960 states and 18830 transitions. [2020-12-22 07:35:26,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:35:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14960 states and 18830 transitions. [2020-12-22 07:35:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 07:35:26,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:26,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:26,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:35:26,420 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 729105995, now seen corresponding path program 1 times [2020-12-22 07:35:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:26,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095049092] [2020-12-22 07:35:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 07:35:26,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095049092] [2020-12-22 07:35:26,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:26,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:26,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127221107] [2020-12-22 07:35:26,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:35:26,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:35:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:35:26,492 INFO L87 Difference]: Start difference. First operand 14960 states and 18830 transitions. Second operand 6 states. [2020-12-22 07:35:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:27,833 INFO L93 Difference]: Finished difference Result 26500 states and 33550 transitions. [2020-12-22 07:35:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:27,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-12-22 07:35:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:27,846 INFO L225 Difference]: With dead ends: 26500 [2020-12-22 07:35:27,847 INFO L226 Difference]: Without dead ends: 11624 [2020-12-22 07:35:27,856 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 07:35:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11624 states. [2020-12-22 07:35:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11624 to 11624. [2020-12-22 07:35:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11624 states. [2020-12-22 07:35:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11624 states to 11624 states and 14624 transitions. [2020-12-22 07:35:29,069 INFO L78 Accepts]: Start accepts. Automaton has 11624 states and 14624 transitions. Word has length 97 [2020-12-22 07:35:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:29,070 INFO L481 AbstractCegarLoop]: Abstraction has 11624 states and 14624 transitions. [2020-12-22 07:35:29,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:35:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 11624 states and 14624 transitions. [2020-12-22 07:35:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:35:29,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:29,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:29,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:35:29,071 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash -94994768, now seen corresponding path program 1 times [2020-12-22 07:35:29,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:29,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127883107] [2020-12-22 07:35:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127883107] [2020-12-22 07:35:29,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687954144] [2020-12-22 07:35:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:35:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:35:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:29,681 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:35:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:29,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:35:29,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:35:29,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830334415] [2020-12-22 07:35:29,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:35:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:29,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:35:29,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:29,999 INFO L87 Difference]: Start difference. First operand 11624 states and 14624 transitions. Second operand 17 states. [2020-12-22 07:35:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:37,230 INFO L93 Difference]: Finished difference Result 59820 states and 74792 transitions. [2020-12-22 07:35:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 07:35:37,231 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 07:35:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:37,286 INFO L225 Difference]: With dead ends: 59820 [2020-12-22 07:35:37,287 INFO L226 Difference]: Without dead ends: 49117 [2020-12-22 07:35:37,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 07:35:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49117 states. [2020-12-22 07:35:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49117 to 29543. [2020-12-22 07:35:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29543 states. [2020-12-22 07:35:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 37000 transitions. [2020-12-22 07:35:40,793 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 37000 transitions. Word has length 98 [2020-12-22 07:35:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:40,793 INFO L481 AbstractCegarLoop]: Abstraction has 29543 states and 37000 transitions. [2020-12-22 07:35:40,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:35:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 37000 transitions. [2020-12-22 07:35:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 07:35:40,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:40,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:40,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 07:35:40,997 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2123580878, now seen corresponding path program 1 times [2020-12-22 07:35:40,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:40,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923515333] [2020-12-22 07:35:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:35:41,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923515333] [2020-12-22 07:35:41,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:41,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:35:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80210269] [2020-12-22 07:35:41,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:41,113 INFO L87 Difference]: Start difference. First operand 29543 states and 37000 transitions. Second operand 7 states. [2020-12-22 07:35:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:45,102 INFO L93 Difference]: Finished difference Result 61633 states and 77470 transitions. [2020-12-22 07:35:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:45,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2020-12-22 07:35:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:45,141 INFO L225 Difference]: With dead ends: 61633 [2020-12-22 07:35:45,141 INFO L226 Difference]: Without dead ends: 32330 [2020-12-22 07:35:45,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:35:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32330 states. [2020-12-22 07:35:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32330 to 32328. [2020-12-22 07:35:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32328 states. [2020-12-22 07:35:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32328 states to 32328 states and 40448 transitions. [2020-12-22 07:35:49,022 INFO L78 Accepts]: Start accepts. Automaton has 32328 states and 40448 transitions. Word has length 98 [2020-12-22 07:35:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:49,023 INFO L481 AbstractCegarLoop]: Abstraction has 32328 states and 40448 transitions. [2020-12-22 07:35:49,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 32328 states and 40448 transitions. [2020-12-22 07:35:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 07:35:49,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:49,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:49,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:35:49,025 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 29054276, now seen corresponding path program 1 times [2020-12-22 07:35:49,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391920110] [2020-12-22 07:35:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:35:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391920110] [2020-12-22 07:35:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977583038] [2020-12-22 07:35:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:35:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:49,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 07:35:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:35:49,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:35:50,051 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-12-22 07:35:50,529 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 07:35:50,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:35:50,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:35:50,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:35:50,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 07:35:50,941 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:35:51,280 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:35:52,051 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:35:52,312 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:35:52,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:35:53,068 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts