/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:05:19,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:05:19,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:05:19,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:05:19,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:05:19,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:05:19,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:05:19,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:05:19,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:05:19,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:05:19,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:05:19,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:05:19,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:05:19,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:05:19,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:05:19,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:05:19,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:05:19,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:05:19,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:05:19,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:05:19,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:05:19,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:05:19,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:05:19,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:05:19,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:05:19,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:05:19,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:05:19,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:05:19,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:05:19,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:05:19,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:05:19,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:05:19,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:05:19,611 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:05:19,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:05:19,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:05:19,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:05:19,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:05:19,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:05:19,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:05:19,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:05:19,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:05:19,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:05:19,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:05:19,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:05:19,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:05:19,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:05:19,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:05:19,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:05:19,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:05:19,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:05:19,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:05:19,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:05:19,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:05:19,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:05:19,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:05:20,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:05:20,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:05:20,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:05:20,034 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:05:20,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:05:20,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e081b25/69a9f8b061104c1d84b9f4b6d242daee/FLAG170b39641 [2020-12-22 08:05:20,909 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:05:20,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:05:20,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e081b25/69a9f8b061104c1d84b9f4b6d242daee/FLAG170b39641 [2020-12-22 08:05:21,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e081b25/69a9f8b061104c1d84b9f4b6d242daee [2020-12-22 08:05:21,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:05:21,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:05:21,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:21,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:05:21,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:05:21,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32de7693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21, skipping insertion in model container [2020-12-22 08:05:21,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:05:21,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:05:21,526 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:05:21,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:21,643 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:05:21,762 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6945,6958] [2020-12-22 08:05:21,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:05:21,817 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:05:21,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21 WrapperNode [2020-12-22 08:05:21,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:05:21,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:21,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:05:21,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:05:21,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:05:21,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:05:21,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:05:21,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:05:21,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:21,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (1/1) ... [2020-12-22 08:05:22,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:05:22,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:05:22,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:05:22,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:05:22,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (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 08:05:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:05:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:05:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:05:22,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:05:23,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:05:23,218 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:05:23,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:23 BoogieIcfgContainer [2020-12-22 08:05:23,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:05:23,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:05:23,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:05:23,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:05:23,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:05:21" (1/3) ... [2020-12-22 08:05:23,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cca796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:23, skipping insertion in model container [2020-12-22 08:05:23,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:05:21" (2/3) ... [2020-12-22 08:05:23,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21cca796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:05:23, skipping insertion in model container [2020-12-22 08:05:23,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:05:23" (3/3) ... [2020-12-22 08:05:23,247 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:05:23,266 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:05:23,278 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:05:23,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:05:23,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:05:23,402 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:05:23,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:05:23,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:05:23,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:05:23,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:05:23,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:05:23,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:05:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-12-22 08:05:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:05:23,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:23,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:23,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2020-12-22 08:05:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:23,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120971892] [2020-12-22 08:05:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:23,991 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 08:05:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120971892] [2020-12-22 08:05:23,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:23,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:23,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499853714] [2020-12-22 08:05:24,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:24,024 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 3 states. [2020-12-22 08:05:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:24,246 INFO L93 Difference]: Finished difference Result 293 states and 496 transitions. [2020-12-22 08:05:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:24,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 08:05:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:24,266 INFO L225 Difference]: With dead ends: 293 [2020-12-22 08:05:24,267 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 08:05:24,272 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 08:05:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 08:05:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-12-22 08:05:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 08:05:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 311 transitions. [2020-12-22 08:05:24,353 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 311 transitions. Word has length 56 [2020-12-22 08:05:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:24,353 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 311 transitions. [2020-12-22 08:05:24,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 311 transitions. [2020-12-22 08:05:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:05:24,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:24,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:24,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:05:24,363 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2020-12-22 08:05:24,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:24,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125067037] [2020-12-22 08:05:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:05:24,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125067037] [2020-12-22 08:05:24,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:24,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978974624] [2020-12-22 08:05:24,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:24,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:24,580 INFO L87 Difference]: Start difference. First operand 198 states and 311 transitions. Second operand 3 states. [2020-12-22 08:05:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:24,730 INFO L93 Difference]: Finished difference Result 472 states and 763 transitions. [2020-12-22 08:05:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:24,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 08:05:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:24,741 INFO L225 Difference]: With dead ends: 472 [2020-12-22 08:05:24,741 INFO L226 Difference]: Without dead ends: 328 [2020-12-22 08:05:24,744 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 08:05:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-22 08:05:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-12-22 08:05:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-22 08:05:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 517 transitions. [2020-12-22 08:05:24,832 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 517 transitions. Word has length 58 [2020-12-22 08:05:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:24,836 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 517 transitions. [2020-12-22 08:05:24,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 517 transitions. [2020-12-22 08:05:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 08:05:24,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:24,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:24,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:05:24,847 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1017067947, now seen corresponding path program 1 times [2020-12-22 08:05:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:24,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155702342] [2020-12-22 08:05:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:24,967 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 08:05:24,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155702342] [2020-12-22 08:05:24,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:24,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:24,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868627576] [2020-12-22 08:05:24,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:24,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:24,970 INFO L87 Difference]: Start difference. First operand 324 states and 517 transitions. Second operand 3 states. [2020-12-22 08:05:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:25,040 INFO L93 Difference]: Finished difference Result 836 states and 1355 transitions. [2020-12-22 08:05:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:25,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-12-22 08:05:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:25,045 INFO L225 Difference]: With dead ends: 836 [2020-12-22 08:05:25,046 INFO L226 Difference]: Without dead ends: 566 [2020-12-22 08:05:25,048 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 08:05:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-12-22 08:05:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2020-12-22 08:05:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-12-22 08:05:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 897 transitions. [2020-12-22 08:05:25,085 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 897 transitions. Word has length 60 [2020-12-22 08:05:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:25,086 INFO L481 AbstractCegarLoop]: Abstraction has 560 states and 897 transitions. [2020-12-22 08:05:25,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 897 transitions. [2020-12-22 08:05:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:05:25,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:25,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:25,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:05:25,091 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:25,092 INFO L82 PathProgramCache]: Analyzing trace with hash 291448600, now seen corresponding path program 1 times [2020-12-22 08:05:25,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:25,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140892208] [2020-12-22 08:05:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:25,256 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 08:05:25,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140892208] [2020-12-22 08:05:25,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:25,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:25,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170185617] [2020-12-22 08:05:25,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:25,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:25,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:25,260 INFO L87 Difference]: Start difference. First operand 560 states and 897 transitions. Second operand 5 states. [2020-12-22 08:05:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:25,553 INFO L93 Difference]: Finished difference Result 2230 states and 3633 transitions. [2020-12-22 08:05:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:25,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 08:05:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:25,565 INFO L225 Difference]: With dead ends: 2230 [2020-12-22 08:05:25,565 INFO L226 Difference]: Without dead ends: 1724 [2020-12-22 08:05:25,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2020-12-22 08:05:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1064. [2020-12-22 08:05:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-12-22 08:05:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1709 transitions. [2020-12-22 08:05:25,652 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1709 transitions. Word has length 62 [2020-12-22 08:05:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:25,652 INFO L481 AbstractCegarLoop]: Abstraction has 1064 states and 1709 transitions. [2020-12-22 08:05:25,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1709 transitions. [2020-12-22 08:05:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:05:25,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:25,655 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 08:05:25,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:05:25,656 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 382467820, now seen corresponding path program 1 times [2020-12-22 08:05:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881896254] [2020-12-22 08:05:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:25,745 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 08:05:25,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881896254] [2020-12-22 08:05:25,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:25,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:25,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603114790] [2020-12-22 08:05:25,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:25,748 INFO L87 Difference]: Start difference. First operand 1064 states and 1709 transitions. Second operand 4 states. [2020-12-22 08:05:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:26,028 INFO L93 Difference]: Finished difference Result 3370 states and 5460 transitions. [2020-12-22 08:05:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:26,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 08:05:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:26,042 INFO L225 Difference]: With dead ends: 3370 [2020-12-22 08:05:26,042 INFO L226 Difference]: Without dead ends: 2360 [2020-12-22 08:05:26,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2020-12-22 08:05:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1955. [2020-12-22 08:05:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2020-12-22 08:05:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 3143 transitions. [2020-12-22 08:05:26,194 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 3143 transitions. Word has length 63 [2020-12-22 08:05:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:26,194 INFO L481 AbstractCegarLoop]: Abstraction has 1955 states and 3143 transitions. [2020-12-22 08:05:26,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 3143 transitions. [2020-12-22 08:05:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:05:26,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:26,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:26,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:05:26,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1086345633, now seen corresponding path program 1 times [2020-12-22 08:05:26,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:26,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305980432] [2020-12-22 08:05:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:26,277 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 08:05:26,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305980432] [2020-12-22 08:05:26,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:26,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:26,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743659044] [2020-12-22 08:05:26,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:26,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:26,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:26,280 INFO L87 Difference]: Start difference. First operand 1955 states and 3143 transitions. Second operand 4 states. [2020-12-22 08:05:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:26,657 INFO L93 Difference]: Finished difference Result 5212 states and 8440 transitions. [2020-12-22 08:05:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:26,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:05:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:26,679 INFO L225 Difference]: With dead ends: 5212 [2020-12-22 08:05:26,679 INFO L226 Difference]: Without dead ends: 3311 [2020-12-22 08:05:26,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2020-12-22 08:05:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2884. [2020-12-22 08:05:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2884 states. [2020-12-22 08:05:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 4633 transitions. [2020-12-22 08:05:26,921 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 4633 transitions. Word has length 64 [2020-12-22 08:05:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:26,921 INFO L481 AbstractCegarLoop]: Abstraction has 2884 states and 4633 transitions. [2020-12-22 08:05:26,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 4633 transitions. [2020-12-22 08:05:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:05:26,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:26,925 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 08:05:26,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:05:26,926 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1879078355, now seen corresponding path program 1 times [2020-12-22 08:05:26,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:26,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149707928] [2020-12-22 08:05:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:27,083 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 08:05:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149707928] [2020-12-22 08:05:27,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:27,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602087440] [2020-12-22 08:05:27,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:27,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:27,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:27,093 INFO L87 Difference]: Start difference. First operand 2884 states and 4633 transitions. Second operand 3 states. [2020-12-22 08:05:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:27,439 INFO L93 Difference]: Finished difference Result 6298 states and 10166 transitions. [2020-12-22 08:05:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:27,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:05:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:27,464 INFO L225 Difference]: With dead ends: 6298 [2020-12-22 08:05:27,465 INFO L226 Difference]: Without dead ends: 4295 [2020-12-22 08:05:27,473 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 08:05:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2020-12-22 08:05:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 4293. [2020-12-22 08:05:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4293 states. [2020-12-22 08:05:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6874 transitions. [2020-12-22 08:05:27,806 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6874 transitions. Word has length 65 [2020-12-22 08:05:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:27,807 INFO L481 AbstractCegarLoop]: Abstraction has 4293 states and 6874 transitions. [2020-12-22 08:05:27,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6874 transitions. [2020-12-22 08:05:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:05:27,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:27,808 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 08:05:27,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:05:27,809 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -450865020, now seen corresponding path program 1 times [2020-12-22 08:05:27,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:27,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516043654] [2020-12-22 08:05:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:27,879 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 08:05:27,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516043654] [2020-12-22 08:05:27,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:27,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:27,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541230431] [2020-12-22 08:05:27,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:27,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:27,883 INFO L87 Difference]: Start difference. First operand 4293 states and 6874 transitions. Second operand 3 states. [2020-12-22 08:05:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:28,291 INFO L93 Difference]: Finished difference Result 8357 states and 13452 transitions. [2020-12-22 08:05:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:28,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:05:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:28,327 INFO L225 Difference]: With dead ends: 8357 [2020-12-22 08:05:28,328 INFO L226 Difference]: Without dead ends: 5929 [2020-12-22 08:05:28,334 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 08:05:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2020-12-22 08:05:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 5927. [2020-12-22 08:05:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5927 states. [2020-12-22 08:05:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 9456 transitions. [2020-12-22 08:05:28,808 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 9456 transitions. Word has length 65 [2020-12-22 08:05:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:28,809 INFO L481 AbstractCegarLoop]: Abstraction has 5927 states and 9456 transitions. [2020-12-22 08:05:28,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 9456 transitions. [2020-12-22 08:05:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:05:28,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:28,813 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 08:05:28,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:05:28,814 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash 629635603, now seen corresponding path program 1 times [2020-12-22 08:05:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444256035] [2020-12-22 08:05:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:28,930 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 08:05:28,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444256035] [2020-12-22 08:05:28,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:28,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174347453] [2020-12-22 08:05:28,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:28,939 INFO L87 Difference]: Start difference. First operand 5927 states and 9456 transitions. Second operand 4 states. [2020-12-22 08:05:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:29,674 INFO L93 Difference]: Finished difference Result 16530 states and 26513 transitions. [2020-12-22 08:05:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:29,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:05:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:29,733 INFO L225 Difference]: With dead ends: 16530 [2020-12-22 08:05:29,734 INFO L226 Difference]: Without dead ends: 10737 [2020-12-22 08:05:29,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2020-12-22 08:05:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 9297. [2020-12-22 08:05:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9297 states. [2020-12-22 08:05:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 14778 transitions. [2020-12-22 08:05:30,516 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 14778 transitions. Word has length 65 [2020-12-22 08:05:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:30,517 INFO L481 AbstractCegarLoop]: Abstraction has 9297 states and 14778 transitions. [2020-12-22 08:05:30,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 14778 transitions. [2020-12-22 08:05:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:05:30,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:30,522 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 08:05:30,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:05:30,523 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1734684554, now seen corresponding path program 1 times [2020-12-22 08:05:30,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:30,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793453640] [2020-12-22 08:05:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:30,585 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 08:05:30,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793453640] [2020-12-22 08:05:30,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:30,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299929424] [2020-12-22 08:05:30,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:30,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:30,591 INFO L87 Difference]: Start difference. First operand 9297 states and 14778 transitions. Second operand 3 states. [2020-12-22 08:05:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:31,355 INFO L93 Difference]: Finished difference Result 22062 states and 35313 transitions. [2020-12-22 08:05:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:31,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 08:05:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:31,400 INFO L225 Difference]: With dead ends: 22062 [2020-12-22 08:05:31,400 INFO L226 Difference]: Without dead ends: 12846 [2020-12-22 08:05:31,418 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 08:05:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12846 states. [2020-12-22 08:05:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12846 to 12844. [2020-12-22 08:05:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12844 states. [2020-12-22 08:05:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12844 states to 12844 states and 20554 transitions. [2020-12-22 08:05:32,476 INFO L78 Accepts]: Start accepts. Automaton has 12844 states and 20554 transitions. Word has length 65 [2020-12-22 08:05:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:32,477 INFO L481 AbstractCegarLoop]: Abstraction has 12844 states and 20554 transitions. [2020-12-22 08:05:32,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 12844 states and 20554 transitions. [2020-12-22 08:05:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:05:32,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:32,478 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 08:05:32,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:05:32,479 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2027885532, now seen corresponding path program 1 times [2020-12-22 08:05:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854557459] [2020-12-22 08:05:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:32,698 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 08:05:32,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854557459] [2020-12-22 08:05:32,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526528349] [2020-12-22 08:05:32,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:32,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:32,700 INFO L87 Difference]: Start difference. First operand 12844 states and 20554 transitions. Second operand 5 states. [2020-12-22 08:05:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:33,882 INFO L93 Difference]: Finished difference Result 30563 states and 49166 transitions. [2020-12-22 08:05:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:33,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:05:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:33,937 INFO L225 Difference]: With dead ends: 30563 [2020-12-22 08:05:33,938 INFO L226 Difference]: Without dead ends: 17800 [2020-12-22 08:05:33,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17800 states. [2020-12-22 08:05:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17800 to 12844. [2020-12-22 08:05:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12844 states. [2020-12-22 08:05:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12844 states to 12844 states and 20404 transitions. [2020-12-22 08:05:34,912 INFO L78 Accepts]: Start accepts. Automaton has 12844 states and 20404 transitions. Word has length 67 [2020-12-22 08:05:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:34,912 INFO L481 AbstractCegarLoop]: Abstraction has 12844 states and 20404 transitions. [2020-12-22 08:05:34,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 12844 states and 20404 transitions. [2020-12-22 08:05:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:05:34,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:34,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:34,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:05:34,914 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1776446511, now seen corresponding path program 1 times [2020-12-22 08:05:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:34,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395146354] [2020-12-22 08:05:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:35,162 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 08:05:35,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395146354] [2020-12-22 08:05:35,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:35,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801938232] [2020-12-22 08:05:35,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:35,165 INFO L87 Difference]: Start difference. First operand 12844 states and 20404 transitions. Second operand 5 states. [2020-12-22 08:05:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:37,267 INFO L93 Difference]: Finished difference Result 41132 states and 65744 transitions. [2020-12-22 08:05:37,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:37,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 08:05:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:37,353 INFO L225 Difference]: With dead ends: 41132 [2020-12-22 08:05:37,353 INFO L226 Difference]: Without dead ends: 28369 [2020-12-22 08:05:37,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28369 states. [2020-12-22 08:05:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28369 to 18617. [2020-12-22 08:05:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18617 states. [2020-12-22 08:05:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18617 states to 18617 states and 29555 transitions. [2020-12-22 08:05:38,806 INFO L78 Accepts]: Start accepts. Automaton has 18617 states and 29555 transitions. Word has length 70 [2020-12-22 08:05:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:38,806 INFO L481 AbstractCegarLoop]: Abstraction has 18617 states and 29555 transitions. [2020-12-22 08:05:38,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 18617 states and 29555 transitions. [2020-12-22 08:05:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:05:38,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:38,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:05:38,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:05:38,808 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 762823713, now seen corresponding path program 1 times [2020-12-22 08:05:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:38,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056621845] [2020-12-22 08:05:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:38,939 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 08:05:38,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056621845] [2020-12-22 08:05:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248073753] [2020-12-22 08:05:38,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:38,941 INFO L87 Difference]: Start difference. First operand 18617 states and 29555 transitions. Second operand 5 states. [2020-12-22 08:05:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:41,607 INFO L93 Difference]: Finished difference Result 37891 states and 59719 transitions. [2020-12-22 08:05:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:05:41,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-12-22 08:05:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:41,666 INFO L225 Difference]: With dead ends: 37891 [2020-12-22 08:05:41,667 INFO L226 Difference]: Without dead ends: 37889 [2020-12-22 08:05:41,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:05:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37889 states. [2020-12-22 08:05:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37889 to 19391. [2020-12-22 08:05:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19391 states. [2020-12-22 08:05:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19391 states to 19391 states and 30320 transitions. [2020-12-22 08:05:43,480 INFO L78 Accepts]: Start accepts. Automaton has 19391 states and 30320 transitions. Word has length 71 [2020-12-22 08:05:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:43,480 INFO L481 AbstractCegarLoop]: Abstraction has 19391 states and 30320 transitions. [2020-12-22 08:05:43,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 19391 states and 30320 transitions. [2020-12-22 08:05:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:05:43,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:43,483 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] [2020-12-22 08:05:43,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:05:43,484 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1613729099, now seen corresponding path program 1 times [2020-12-22 08:05:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:43,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754502603] [2020-12-22 08:05:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:05:43,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754502603] [2020-12-22 08:05:43,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:43,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506152395] [2020-12-22 08:05:43,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:43,626 INFO L87 Difference]: Start difference. First operand 19391 states and 30320 transitions. Second operand 5 states. [2020-12-22 08:05:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:45,316 INFO L93 Difference]: Finished difference Result 28575 states and 45160 transitions. [2020-12-22 08:05:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:45,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:05:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:45,350 INFO L225 Difference]: With dead ends: 28575 [2020-12-22 08:05:45,350 INFO L226 Difference]: Without dead ends: 22757 [2020-12-22 08:05:45,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22757 states. [2020-12-22 08:05:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22757 to 21282. [2020-12-22 08:05:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21282 states. [2020-12-22 08:05:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21282 states to 21282 states and 33268 transitions. [2020-12-22 08:05:47,963 INFO L78 Accepts]: Start accepts. Automaton has 21282 states and 33268 transitions. Word has length 93 [2020-12-22 08:05:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:47,964 INFO L481 AbstractCegarLoop]: Abstraction has 21282 states and 33268 transitions. [2020-12-22 08:05:47,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21282 states and 33268 transitions. [2020-12-22 08:05:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:05:47,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:47,967 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] [2020-12-22 08:05:47,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:05:47,967 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 351294822, now seen corresponding path program 1 times [2020-12-22 08:05:47,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:47,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389615608] [2020-12-22 08:05:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:48,064 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 08:05:48,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389615608] [2020-12-22 08:05:48,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:48,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:48,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265395730] [2020-12-22 08:05:48,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:48,066 INFO L87 Difference]: Start difference. First operand 21282 states and 33268 transitions. Second operand 5 states. [2020-12-22 08:05:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:49,747 INFO L93 Difference]: Finished difference Result 29737 states and 46856 transitions. [2020-12-22 08:05:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:49,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:05:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:49,783 INFO L225 Difference]: With dead ends: 29737 [2020-12-22 08:05:49,783 INFO L226 Difference]: Without dead ends: 23919 [2020-12-22 08:05:49,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23919 states. [2020-12-22 08:05:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23919 to 23329. [2020-12-22 08:05:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23329 states. [2020-12-22 08:05:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23329 states to 23329 states and 36522 transitions. [2020-12-22 08:05:51,969 INFO L78 Accepts]: Start accepts. Automaton has 23329 states and 36522 transitions. Word has length 93 [2020-12-22 08:05:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:51,969 INFO L481 AbstractCegarLoop]: Abstraction has 23329 states and 36522 transitions. [2020-12-22 08:05:51,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 23329 states and 36522 transitions. [2020-12-22 08:05:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:05:51,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:51,972 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] [2020-12-22 08:05:51,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:05:51,972 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1758122900, now seen corresponding path program 1 times [2020-12-22 08:05:51,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:51,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442748342] [2020-12-22 08:05:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:05:52,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442748342] [2020-12-22 08:05:52,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:52,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441062538] [2020-12-22 08:05:52,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:52,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:52,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:52,090 INFO L87 Difference]: Start difference. First operand 23329 states and 36522 transitions. Second operand 5 states. [2020-12-22 08:05:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:54,262 INFO L93 Difference]: Finished difference Result 35345 states and 55739 transitions. [2020-12-22 08:05:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:05:54,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-12-22 08:05:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:54,300 INFO L225 Difference]: With dead ends: 35345 [2020-12-22 08:05:54,300 INFO L226 Difference]: Without dead ends: 28003 [2020-12-22 08:05:54,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28003 states. [2020-12-22 08:05:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28003 to 25685. [2020-12-22 08:05:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25685 states. [2020-12-22 08:05:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25685 states to 25685 states and 40244 transitions. [2020-12-22 08:05:56,435 INFO L78 Accepts]: Start accepts. Automaton has 25685 states and 40244 transitions. Word has length 93 [2020-12-22 08:05:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:56,436 INFO L481 AbstractCegarLoop]: Abstraction has 25685 states and 40244 transitions. [2020-12-22 08:05:56,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25685 states and 40244 transitions. [2020-12-22 08:05:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:05:56,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:56,440 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-22 08:05:56,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:05:56,440 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1270260760, now seen corresponding path program 1 times [2020-12-22 08:05:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:56,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835242874] [2020-12-22 08:05:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:05:56,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835242874] [2020-12-22 08:05:56,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:56,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539996347] [2020-12-22 08:05:56,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:56,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:56,515 INFO L87 Difference]: Start difference. First operand 25685 states and 40244 transitions. Second operand 4 states. [2020-12-22 08:05:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:58,655 INFO L93 Difference]: Finished difference Result 40107 states and 63230 transitions. [2020-12-22 08:05:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:58,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 08:05:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:58,704 INFO L225 Difference]: With dead ends: 40107 [2020-12-22 08:05:58,705 INFO L226 Difference]: Without dead ends: 30409 [2020-12-22 08:05:58,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30409 states. [2020-12-22 08:06:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30409 to 29245. [2020-12-22 08:06:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29245 states. [2020-12-22 08:06:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29245 states to 29245 states and 45821 transitions. [2020-12-22 08:06:01,195 INFO L78 Accepts]: Start accepts. Automaton has 29245 states and 45821 transitions. Word has length 94 [2020-12-22 08:06:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:01,195 INFO L481 AbstractCegarLoop]: Abstraction has 29245 states and 45821 transitions. [2020-12-22 08:06:01,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29245 states and 45821 transitions. [2020-12-22 08:06:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 08:06:01,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:01,199 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-22 08:06:01,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:06:01,199 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash 36164624, now seen corresponding path program 1 times [2020-12-22 08:06:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725407853] [2020-12-22 08:06:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 08:06:01,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725407853] [2020-12-22 08:06:01,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:01,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:01,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535279999] [2020-12-22 08:06:01,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:01,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:01,261 INFO L87 Difference]: Start difference. First operand 29245 states and 45821 transitions. Second operand 3 states. [2020-12-22 08:06:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:05,363 INFO L93 Difference]: Finished difference Result 64419 states and 101130 transitions. [2020-12-22 08:06:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:05,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 08:06:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:05,452 INFO L225 Difference]: With dead ends: 64419 [2020-12-22 08:06:05,452 INFO L226 Difference]: Without dead ends: 51881 [2020-12-22 08:06:05,477 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 08:06:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51881 states. [2020-12-22 08:06:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51881 to 51822. [2020-12-22 08:06:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51822 states. [2020-12-22 08:06:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51822 states to 51822 states and 81069 transitions. [2020-12-22 08:06:09,682 INFO L78 Accepts]: Start accepts. Automaton has 51822 states and 81069 transitions. Word has length 94 [2020-12-22 08:06:09,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:09,682 INFO L481 AbstractCegarLoop]: Abstraction has 51822 states and 81069 transitions. [2020-12-22 08:06:09,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:09,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51822 states and 81069 transitions. [2020-12-22 08:06:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:06:09,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:09,685 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 08:06:09,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:06:09,685 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1988921020, now seen corresponding path program 1 times [2020-12-22 08:06:09,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:09,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809569626] [2020-12-22 08:06:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:06:09,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809569626] [2020-12-22 08:06:09,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:09,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:09,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750507735] [2020-12-22 08:06:09,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:09,763 INFO L87 Difference]: Start difference. First operand 51822 states and 81069 transitions. Second operand 4 states. [2020-12-22 08:06:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:14,613 INFO L93 Difference]: Finished difference Result 73169 states and 115066 transitions. [2020-12-22 08:06:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:06:14,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-12-22 08:06:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:14,708 INFO L225 Difference]: With dead ends: 73169 [2020-12-22 08:06:14,708 INFO L226 Difference]: Without dead ends: 58534 [2020-12-22 08:06:14,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58534 states. [2020-12-22 08:06:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58534 to 55050. [2020-12-22 08:06:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55050 states. [2020-12-22 08:06:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55050 states to 55050 states and 86117 transitions. [2020-12-22 08:06:19,363 INFO L78 Accepts]: Start accepts. Automaton has 55050 states and 86117 transitions. Word has length 95 [2020-12-22 08:06:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:19,366 INFO L481 AbstractCegarLoop]: Abstraction has 55050 states and 86117 transitions. [2020-12-22 08:06:19,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:06:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 55050 states and 86117 transitions. [2020-12-22 08:06:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:06:19,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:19,370 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 08:06:19,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:06:19,372 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1437742065, now seen corresponding path program 1 times [2020-12-22 08:06:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:19,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570239603] [2020-12-22 08:06:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 08:06:19,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570239603] [2020-12-22 08:06:19,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:19,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:19,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909774103] [2020-12-22 08:06:19,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:19,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:19,477 INFO L87 Difference]: Start difference. First operand 55050 states and 86117 transitions. Second operand 3 states. [2020-12-22 08:06:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:26,575 INFO L93 Difference]: Finished difference Result 111329 states and 174833 transitions. [2020-12-22 08:06:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:26,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:06:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:26,720 INFO L225 Difference]: With dead ends: 111329 [2020-12-22 08:06:26,720 INFO L226 Difference]: Without dead ends: 89365 [2020-12-22 08:06:26,756 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 08:06:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89365 states. [2020-12-22 08:06:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89365 to 89228. [2020-12-22 08:06:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89228 states. [2020-12-22 08:06:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89228 states to 89228 states and 139461 transitions. [2020-12-22 08:06:34,221 INFO L78 Accepts]: Start accepts. Automaton has 89228 states and 139461 transitions. Word has length 95 [2020-12-22 08:06:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:34,221 INFO L481 AbstractCegarLoop]: Abstraction has 89228 states and 139461 transitions. [2020-12-22 08:06:34,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 89228 states and 139461 transitions. [2020-12-22 08:06:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:06:34,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:34,226 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-22 08:06:34,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:06:34,226 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1035854142, now seen corresponding path program 1 times [2020-12-22 08:06:34,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:34,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967750386] [2020-12-22 08:06:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:06:34,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967750386] [2020-12-22 08:06:34,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:34,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:06:34,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033107184] [2020-12-22 08:06:34,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:06:34,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:06:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:34,310 INFO L87 Difference]: Start difference. First operand 89228 states and 139461 transitions. Second operand 3 states. [2020-12-22 08:06:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:49,370 INFO L93 Difference]: Finished difference Result 262942 states and 410968 transitions. [2020-12-22 08:06:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:49,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 08:06:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:49,726 INFO L225 Difference]: With dead ends: 262942 [2020-12-22 08:06:49,726 INFO L226 Difference]: Without dead ends: 173784 [2020-12-22 08:06:50,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:06:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173784 states. [2020-12-22 08:07:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173784 to 173782. [2020-12-22 08:07:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173782 states. [2020-12-22 08:07:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173782 states to 173782 states and 269977 transitions. [2020-12-22 08:07:05,404 INFO L78 Accepts]: Start accepts. Automaton has 173782 states and 269977 transitions. Word has length 95 [2020-12-22 08:07:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:07:05,404 INFO L481 AbstractCegarLoop]: Abstraction has 173782 states and 269977 transitions. [2020-12-22 08:07:05,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:07:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 173782 states and 269977 transitions. [2020-12-22 08:07:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 08:07:05,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:07:05,442 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-22 08:07:05,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:07:05,443 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:07:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:07:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1015816888, now seen corresponding path program 1 times [2020-12-22 08:07:05,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:07:05,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087416210] [2020-12-22 08:07:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:07:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:07:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:07:05,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087416210] [2020-12-22 08:07:05,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:07:05,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:07:05,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511758680] [2020-12-22 08:07:05,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:07:05,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:07:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:07:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:07:05,547 INFO L87 Difference]: Start difference. First operand 173782 states and 269977 transitions. Second operand 3 states.