/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/systemc/token_ring.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:09:00,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:09:00,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:09:00,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:09:00,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:09:00,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:09:00,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:09:00,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:09:00,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:09:00,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:09:00,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:09:00,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:09:00,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:09:00,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:09:00,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:09:00,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:09:00,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:09:00,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:09:00,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:09:00,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:09:00,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:09:00,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:09:00,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:09:00,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:09:00,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:09:00,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:09:00,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:09:00,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:09:00,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:09:00,900 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:09:00,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:09:00,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:09:00,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:09:00,905 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:09:00,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:09:00,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:09:00,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:09:00,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:09:00,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:09:00,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:09:00,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:09:00,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:09:00,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:09:00,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:09:00,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:09:00,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:09:00,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:09:00,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:09:00,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:09:00,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:09:00,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:09:00,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:09:00,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:09:00,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:09:00,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:09:01,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:09:01,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:09:01,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:09:01,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:09:01,412 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:09:01,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2020-12-22 07:09:01,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74aac4ef/a54d5b1b00864b8680b69389a2aaa270/FLAGb3b2bda4b [2020-12-22 07:09:02,170 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:09:02,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2020-12-22 07:09:02,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74aac4ef/a54d5b1b00864b8680b69389a2aaa270/FLAGb3b2bda4b [2020-12-22 07:09:02,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74aac4ef/a54d5b1b00864b8680b69389a2aaa270 [2020-12-22 07:09:02,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:09:02,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:09:02,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:02,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:09:02,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:09:02,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:02" (1/1) ... [2020-12-22 07:09:02,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c51d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:02, skipping insertion in model container [2020-12-22 07:09:02,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:09:02" (1/1) ... [2020-12-22 07:09:02,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:09:02,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:09:02,763 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/systemc/token_ring.06.cil-1.c[366,379] [2020-12-22 07:09:02,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:02,902 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:09:02,914 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/systemc/token_ring.06.cil-1.c[366,379] [2020-12-22 07:09:02,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:09:03,006 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:09:03,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03 WrapperNode [2020-12-22 07:09:03,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:09:03,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:03,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:09:03,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:09:03,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:09:03,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:09:03,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:09:03,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:09:03,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... [2020-12-22 07:09:03,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:09:03,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:09:03,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:09:03,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:09:03,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:09:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:09:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:09:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:09:03,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:09:04,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:09:04,979 INFO L299 CfgBuilder]: Removed 237 assume(true) statements. [2020-12-22 07:09:04,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:04 BoogieIcfgContainer [2020-12-22 07:09:04,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:09:04,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:09:04,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:09:04,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:09:04,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:09:02" (1/3) ... [2020-12-22 07:09:04,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b904b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:04, skipping insertion in model container [2020-12-22 07:09:04,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:09:03" (2/3) ... [2020-12-22 07:09:04,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b904b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:09:04, skipping insertion in model container [2020-12-22 07:09:04,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:09:04" (3/3) ... [2020-12-22 07:09:04,991 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2020-12-22 07:09:04,998 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:09:05,004 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 07:09:05,024 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 07:09:05,057 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:09:05,057 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:09:05,058 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:09:05,058 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:09:05,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:09:05,058 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:09:05,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:09:05,058 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:09:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states. [2020-12-22 07:09:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:05,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:05,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:05,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1352099133, now seen corresponding path program 1 times [2020-12-22 07:09:05,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:05,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496654321] [2020-12-22 07:09:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:05,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496654321] [2020-12-22 07:09:05,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:05,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:05,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774874772] [2020-12-22 07:09:05,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:05,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:05,538 INFO L87 Difference]: Start difference. First operand 673 states. Second operand 3 states. [2020-12-22 07:09:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:05,672 INFO L93 Difference]: Finished difference Result 1341 states and 2065 transitions. [2020-12-22 07:09:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:05,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:05,713 INFO L225 Difference]: With dead ends: 1341 [2020-12-22 07:09:05,714 INFO L226 Difference]: Without dead ends: 669 [2020-12-22 07:09:05,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-12-22 07:09:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 669. [2020-12-22 07:09:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-12-22 07:09:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1011 transitions. [2020-12-22 07:09:05,850 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1011 transitions. Word has length 94 [2020-12-22 07:09:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:05,851 INFO L481 AbstractCegarLoop]: Abstraction has 669 states and 1011 transitions. [2020-12-22 07:09:05,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1011 transitions. [2020-12-22 07:09:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:05,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:05,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:05,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:09:05,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:05,864 INFO L82 PathProgramCache]: Analyzing trace with hash -524964097, now seen corresponding path program 1 times [2020-12-22 07:09:05,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:05,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465714120] [2020-12-22 07:09:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:06,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465714120] [2020-12-22 07:09:06,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:06,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:06,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314484330] [2020-12-22 07:09:06,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:06,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:06,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:06,041 INFO L87 Difference]: Start difference. First operand 669 states and 1011 transitions. Second operand 3 states. [2020-12-22 07:09:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:06,124 INFO L93 Difference]: Finished difference Result 1859 states and 2801 transitions. [2020-12-22 07:09:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:06,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:06,133 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 07:09:06,133 INFO L226 Difference]: Without dead ends: 1201 [2020-12-22 07:09:06,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2020-12-22 07:09:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1197. [2020-12-22 07:09:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1802 transitions. [2020-12-22 07:09:06,213 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1802 transitions. Word has length 94 [2020-12-22 07:09:06,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:06,214 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1802 transitions. [2020-12-22 07:09:06,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1802 transitions. [2020-12-22 07:09:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:06,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:06,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:06,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:09:06,222 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1381399163, now seen corresponding path program 1 times [2020-12-22 07:09:06,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:06,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90106328] [2020-12-22 07:09:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:06,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90106328] [2020-12-22 07:09:06,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:06,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:06,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210975111] [2020-12-22 07:09:06,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:06,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:06,339 INFO L87 Difference]: Start difference. First operand 1197 states and 1802 transitions. Second operand 4 states. [2020-12-22 07:09:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:06,493 INFO L93 Difference]: Finished difference Result 2913 states and 4378 transitions. [2020-12-22 07:09:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:06,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:06,504 INFO L225 Difference]: With dead ends: 2913 [2020-12-22 07:09:06,504 INFO L226 Difference]: Without dead ends: 1728 [2020-12-22 07:09:06,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2020-12-22 07:09:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1197. [2020-12-22 07:09:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1799 transitions. [2020-12-22 07:09:06,570 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1799 transitions. Word has length 94 [2020-12-22 07:09:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:06,570 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1799 transitions. [2020-12-22 07:09:06,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1799 transitions. [2020-12-22 07:09:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:06,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:06,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:06,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:09:06,573 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:06,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1588711939, now seen corresponding path program 1 times [2020-12-22 07:09:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:06,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077258512] [2020-12-22 07:09:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:06,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077258512] [2020-12-22 07:09:06,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:06,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:06,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476451302] [2020-12-22 07:09:06,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:06,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:06,633 INFO L87 Difference]: Start difference. First operand 1197 states and 1799 transitions. Second operand 4 states. [2020-12-22 07:09:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:06,777 INFO L93 Difference]: Finished difference Result 2909 states and 4364 transitions. [2020-12-22 07:09:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:06,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:06,788 INFO L225 Difference]: With dead ends: 2909 [2020-12-22 07:09:06,788 INFO L226 Difference]: Without dead ends: 1726 [2020-12-22 07:09:06,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2020-12-22 07:09:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1197. [2020-12-22 07:09:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1796 transitions. [2020-12-22 07:09:06,895 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1796 transitions. Word has length 94 [2020-12-22 07:09:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:06,895 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1796 transitions. [2020-12-22 07:09:06,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1796 transitions. [2020-12-22 07:09:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:06,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:06,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:06,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:09:06,898 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1648417279, now seen corresponding path program 1 times [2020-12-22 07:09:06,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:06,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414931376] [2020-12-22 07:09:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:07,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414931376] [2020-12-22 07:09:07,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:07,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367846500] [2020-12-22 07:09:07,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:07,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:07,015 INFO L87 Difference]: Start difference. First operand 1197 states and 1796 transitions. Second operand 3 states. [2020-12-22 07:09:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,101 INFO L93 Difference]: Finished difference Result 2379 states and 3569 transitions. [2020-12-22 07:09:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:07,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,111 INFO L225 Difference]: With dead ends: 2379 [2020-12-22 07:09:07,111 INFO L226 Difference]: Without dead ends: 1197 [2020-12-22 07:09:07,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-12-22 07:09:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1197. [2020-12-22 07:09:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1788 transitions. [2020-12-22 07:09:07,180 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1788 transitions. Word has length 94 [2020-12-22 07:09:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,180 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1788 transitions. [2020-12-22 07:09:07,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1788 transitions. [2020-12-22 07:09:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:07,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:09:07,182 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 371901307, now seen corresponding path program 1 times [2020-12-22 07:09:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874089390] [2020-12-22 07:09:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874089390] [2020-12-22 07:09:07,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:07,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114867008] [2020-12-22 07:09:07,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:07,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:07,268 INFO L87 Difference]: Start difference. First operand 1197 states and 1788 transitions. Second operand 3 states. [2020-12-22 07:09:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,348 INFO L93 Difference]: Finished difference Result 2378 states and 3552 transitions. [2020-12-22 07:09:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:07,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,356 INFO L225 Difference]: With dead ends: 2378 [2020-12-22 07:09:07,356 INFO L226 Difference]: Without dead ends: 1197 [2020-12-22 07:09:07,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-12-22 07:09:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1197. [2020-12-22 07:09:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1780 transitions. [2020-12-22 07:09:07,439 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1780 transitions. Word has length 94 [2020-12-22 07:09:07,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1780 transitions. [2020-12-22 07:09:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1780 transitions. [2020-12-22 07:09:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:07,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:09:07,442 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1193297281, now seen corresponding path program 1 times [2020-12-22 07:09:07,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147571264] [2020-12-22 07:09:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:07,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147571264] [2020-12-22 07:09:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978041576] [2020-12-22 07:09:07,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:07,517 INFO L87 Difference]: Start difference. First operand 1197 states and 1780 transitions. Second operand 4 states. [2020-12-22 07:09:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:07,671 INFO L93 Difference]: Finished difference Result 2903 states and 4312 transitions. [2020-12-22 07:09:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:07,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:07,680 INFO L225 Difference]: With dead ends: 2903 [2020-12-22 07:09:07,681 INFO L226 Difference]: Without dead ends: 1723 [2020-12-22 07:09:07,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2020-12-22 07:09:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1197. [2020-12-22 07:09:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1777 transitions. [2020-12-22 07:09:07,764 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1777 transitions. Word has length 94 [2020-12-22 07:09:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:07,764 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1777 transitions. [2020-12-22 07:09:07,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1777 transitions. [2020-12-22 07:09:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:07,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:07,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:07,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:09:07,767 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash -354263619, now seen corresponding path program 1 times [2020-12-22 07:09:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:07,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47497671] [2020-12-22 07:09:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:07,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47497671] [2020-12-22 07:09:07,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:07,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:07,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305148423] [2020-12-22 07:09:07,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:07,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:07,844 INFO L87 Difference]: Start difference. First operand 1197 states and 1777 transitions. Second operand 4 states. [2020-12-22 07:09:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,082 INFO L93 Difference]: Finished difference Result 2852 states and 4232 transitions. [2020-12-22 07:09:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:08,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,092 INFO L225 Difference]: With dead ends: 2852 [2020-12-22 07:09:08,092 INFO L226 Difference]: Without dead ends: 1673 [2020-12-22 07:09:08,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2020-12-22 07:09:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1197. [2020-12-22 07:09:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1774 transitions. [2020-12-22 07:09:08,174 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1774 transitions. Word has length 94 [2020-12-22 07:09:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,174 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1774 transitions. [2020-12-22 07:09:08,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1774 transitions. [2020-12-22 07:09:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:08,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:09:08,178 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -327198017, now seen corresponding path program 1 times [2020-12-22 07:09:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904351190] [2020-12-22 07:09:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:08,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904351190] [2020-12-22 07:09:08,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:08,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063889599] [2020-12-22 07:09:08,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:08,233 INFO L87 Difference]: Start difference. First operand 1197 states and 1774 transitions. Second operand 4 states. [2020-12-22 07:09:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,470 INFO L93 Difference]: Finished difference Result 2850 states and 4222 transitions. [2020-12-22 07:09:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:08,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,479 INFO L225 Difference]: With dead ends: 2850 [2020-12-22 07:09:08,480 INFO L226 Difference]: Without dead ends: 1672 [2020-12-22 07:09:08,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2020-12-22 07:09:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1197. [2020-12-22 07:09:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1771 transitions. [2020-12-22 07:09:08,562 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1771 transitions. Word has length 94 [2020-12-22 07:09:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,562 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1771 transitions. [2020-12-22 07:09:08,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1771 transitions. [2020-12-22 07:09:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:08,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:09:08,564 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1890432381, now seen corresponding path program 1 times [2020-12-22 07:09:08,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020607383] [2020-12-22 07:09:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020607383] [2020-12-22 07:09:08,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412568225] [2020-12-22 07:09:08,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:08,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:08,622 INFO L87 Difference]: Start difference. First operand 1197 states and 1771 transitions. Second operand 3 states. [2020-12-22 07:09:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:08,756 INFO L93 Difference]: Finished difference Result 2374 states and 3514 transitions. [2020-12-22 07:09:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:08,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 07:09:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:08,770 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 07:09:08,770 INFO L226 Difference]: Without dead ends: 1197 [2020-12-22 07:09:08,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-12-22 07:09:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1197. [2020-12-22 07:09:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1747 transitions. [2020-12-22 07:09:08,870 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1747 transitions. Word has length 94 [2020-12-22 07:09:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:08,871 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1747 transitions. [2020-12-22 07:09:08,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1747 transitions. [2020-12-22 07:09:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:08,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:08,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:08,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:09:08,873 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2119106878, now seen corresponding path program 1 times [2020-12-22 07:09:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:08,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252698410] [2020-12-22 07:09:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252698410] [2020-12-22 07:09:08,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:08,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860205502] [2020-12-22 07:09:08,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:08,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:08,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:08,986 INFO L87 Difference]: Start difference. First operand 1197 states and 1747 transitions. Second operand 4 states. [2020-12-22 07:09:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:09,245 INFO L93 Difference]: Finished difference Result 2844 states and 4149 transitions. [2020-12-22 07:09:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:09,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:09,256 INFO L225 Difference]: With dead ends: 2844 [2020-12-22 07:09:09,257 INFO L226 Difference]: Without dead ends: 1669 [2020-12-22 07:09:09,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2020-12-22 07:09:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1197. [2020-12-22 07:09:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1744 transitions. [2020-12-22 07:09:09,344 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1744 transitions. Word has length 94 [2020-12-22 07:09:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:09,345 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1744 transitions. [2020-12-22 07:09:09,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1744 transitions. [2020-12-22 07:09:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:09,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:09,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:09,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:09:09,346 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash 264817860, now seen corresponding path program 1 times [2020-12-22 07:09:09,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:09,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506092656] [2020-12-22 07:09:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:09,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506092656] [2020-12-22 07:09:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:09,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:09,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33878987] [2020-12-22 07:09:09,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:09,401 INFO L87 Difference]: Start difference. First operand 1197 states and 1744 transitions. Second operand 4 states. [2020-12-22 07:09:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:09,644 INFO L93 Difference]: Finished difference Result 2842 states and 4139 transitions. [2020-12-22 07:09:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:09,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:09,653 INFO L225 Difference]: With dead ends: 2842 [2020-12-22 07:09:09,653 INFO L226 Difference]: Without dead ends: 1668 [2020-12-22 07:09:09,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:09,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2020-12-22 07:09:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1197. [2020-12-22 07:09:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1741 transitions. [2020-12-22 07:09:09,746 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1741 transitions. Word has length 94 [2020-12-22 07:09:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:09,746 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1741 transitions. [2020-12-22 07:09:09,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1741 transitions. [2020-12-22 07:09:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:09,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:09,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:09,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:09:09,748 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash 341718658, now seen corresponding path program 1 times [2020-12-22 07:09:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:09,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519830450] [2020-12-22 07:09:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:09,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519830450] [2020-12-22 07:09:09,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:09,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915677494] [2020-12-22 07:09:09,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:09,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:09,797 INFO L87 Difference]: Start difference. First operand 1197 states and 1741 transitions. Second operand 4 states. [2020-12-22 07:09:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,041 INFO L93 Difference]: Finished difference Result 2840 states and 4129 transitions. [2020-12-22 07:09:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:10,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,051 INFO L225 Difference]: With dead ends: 2840 [2020-12-22 07:09:10,051 INFO L226 Difference]: Without dead ends: 1667 [2020-12-22 07:09:10,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2020-12-22 07:09:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1197. [2020-12-22 07:09:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 07:09:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1738 transitions. [2020-12-22 07:09:10,164 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1738 transitions. Word has length 94 [2020-12-22 07:09:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:10,165 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1738 transitions. [2020-12-22 07:09:10,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1738 transitions. [2020-12-22 07:09:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:10,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:10,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:09:10,168 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash -625631996, now seen corresponding path program 1 times [2020-12-22 07:09:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106809633] [2020-12-22 07:09:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106809633] [2020-12-22 07:09:10,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:10,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757861347] [2020-12-22 07:09:10,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:10,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:10,224 INFO L87 Difference]: Start difference. First operand 1197 states and 1738 transitions. Second operand 5 states. [2020-12-22 07:09:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:10,633 INFO L93 Difference]: Finished difference Result 4545 states and 6592 transitions. [2020-12-22 07:09:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:10,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 94 [2020-12-22 07:09:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:10,650 INFO L225 Difference]: With dead ends: 4545 [2020-12-22 07:09:10,650 INFO L226 Difference]: Without dead ends: 3379 [2020-12-22 07:09:10,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2020-12-22 07:09:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 1251. [2020-12-22 07:09:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1251 states. [2020-12-22 07:09:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1792 transitions. [2020-12-22 07:09:10,769 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1792 transitions. Word has length 94 [2020-12-22 07:09:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:10,770 INFO L481 AbstractCegarLoop]: Abstraction has 1251 states and 1792 transitions. [2020-12-22 07:09:10,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1792 transitions. [2020-12-22 07:09:10,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:09:10,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:10,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:10,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:09:10,772 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1983155462, now seen corresponding path program 1 times [2020-12-22 07:09:10,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:10,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004708013] [2020-12-22 07:09:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:09:10,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004708013] [2020-12-22 07:09:10,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:10,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:10,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958044877] [2020-12-22 07:09:10,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:10,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:10,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:10,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:10,816 INFO L87 Difference]: Start difference. First operand 1251 states and 1792 transitions. Second operand 4 states. [2020-12-22 07:09:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:11,264 INFO L93 Difference]: Finished difference Result 4555 states and 6509 transitions. [2020-12-22 07:09:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:11,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-12-22 07:09:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:11,282 INFO L225 Difference]: With dead ends: 4555 [2020-12-22 07:09:11,282 INFO L226 Difference]: Without dead ends: 3330 [2020-12-22 07:09:11,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2020-12-22 07:09:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3142. [2020-12-22 07:09:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3142 states. [2020-12-22 07:09:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4449 transitions. [2020-12-22 07:09:11,560 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4449 transitions. Word has length 94 [2020-12-22 07:09:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:11,561 INFO L481 AbstractCegarLoop]: Abstraction has 3142 states and 4449 transitions. [2020-12-22 07:09:11,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4449 transitions. [2020-12-22 07:09:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:11,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:11,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:11,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:09:11,564 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1031868449, now seen corresponding path program 1 times [2020-12-22 07:09:11,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:11,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493008050] [2020-12-22 07:09:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:11,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493008050] [2020-12-22 07:09:11,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:11,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336624006] [2020-12-22 07:09:11,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:11,619 INFO L87 Difference]: Start difference. First operand 3142 states and 4449 transitions. Second operand 5 states. [2020-12-22 07:09:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:12,233 INFO L93 Difference]: Finished difference Result 8247 states and 11722 transitions. [2020-12-22 07:09:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:12,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 07:09:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:12,249 INFO L225 Difference]: With dead ends: 8247 [2020-12-22 07:09:12,250 INFO L226 Difference]: Without dead ends: 5141 [2020-12-22 07:09:12,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2020-12-22 07:09:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3193. [2020-12-22 07:09:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3193 states. [2020-12-22 07:09:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4471 transitions. [2020-12-22 07:09:12,565 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4471 transitions. Word has length 111 [2020-12-22 07:09:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:12,566 INFO L481 AbstractCegarLoop]: Abstraction has 3193 states and 4471 transitions. [2020-12-22 07:09:12,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4471 transitions. [2020-12-22 07:09:12,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:12,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:12,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:12,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:09:12,569 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:12,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1045468449, now seen corresponding path program 1 times [2020-12-22 07:09:12,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:12,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076135823] [2020-12-22 07:09:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076135823] [2020-12-22 07:09:12,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:12,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712701845] [2020-12-22 07:09:12,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:12,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:12,620 INFO L87 Difference]: Start difference. First operand 3193 states and 4471 transitions. Second operand 5 states. [2020-12-22 07:09:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:13,104 INFO L93 Difference]: Finished difference Result 7195 states and 10061 transitions. [2020-12-22 07:09:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:13,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 07:09:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:13,113 INFO L225 Difference]: With dead ends: 7195 [2020-12-22 07:09:13,113 INFO L226 Difference]: Without dead ends: 4045 [2020-12-22 07:09:13,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2020-12-22 07:09:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3199. [2020-12-22 07:09:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3199 states. [2020-12-22 07:09:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3199 states to 3199 states and 4433 transitions. [2020-12-22 07:09:13,372 INFO L78 Accepts]: Start accepts. Automaton has 3199 states and 4433 transitions. Word has length 111 [2020-12-22 07:09:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:13,372 INFO L481 AbstractCegarLoop]: Abstraction has 3199 states and 4433 transitions. [2020-12-22 07:09:13,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3199 states and 4433 transitions. [2020-12-22 07:09:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:09:13,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:13,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:13,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:09:13,375 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash 862989341, now seen corresponding path program 1 times [2020-12-22 07:09:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:13,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510435921] [2020-12-22 07:09:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:13,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510435921] [2020-12-22 07:09:13,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:13,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287900455] [2020-12-22 07:09:13,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:13,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:13,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:13,426 INFO L87 Difference]: Start difference. First operand 3199 states and 4433 transitions. Second operand 4 states. [2020-12-22 07:09:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:14,462 INFO L93 Difference]: Finished difference Result 11845 states and 16399 transitions. [2020-12-22 07:09:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:14,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 07:09:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:14,482 INFO L225 Difference]: With dead ends: 11845 [2020-12-22 07:09:14,483 INFO L226 Difference]: Without dead ends: 8698 [2020-12-22 07:09:14,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8698 states. [2020-12-22 07:09:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8698 to 8336. [2020-12-22 07:09:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8336 states. [2020-12-22 07:09:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 11446 transitions. [2020-12-22 07:09:15,070 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 11446 transitions. Word has length 111 [2020-12-22 07:09:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:15,071 INFO L481 AbstractCegarLoop]: Abstraction has 8336 states and 11446 transitions. [2020-12-22 07:09:15,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 11446 transitions. [2020-12-22 07:09:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:15,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:15,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:15,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:09:15,074 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1471832485, now seen corresponding path program 1 times [2020-12-22 07:09:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:15,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168517146] [2020-12-22 07:09:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:15,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168517146] [2020-12-22 07:09:15,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:15,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:15,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40135230] [2020-12-22 07:09:15,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:15,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:15,125 INFO L87 Difference]: Start difference. First operand 8336 states and 11446 transitions. Second operand 5 states. [2020-12-22 07:09:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:16,312 INFO L93 Difference]: Finished difference Result 21065 states and 29122 transitions. [2020-12-22 07:09:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:16,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:16,344 INFO L225 Difference]: With dead ends: 21065 [2020-12-22 07:09:16,345 INFO L226 Difference]: Without dead ends: 12785 [2020-12-22 07:09:16,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12785 states. [2020-12-22 07:09:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12785 to 8471. [2020-12-22 07:09:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8471 states. [2020-12-22 07:09:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 11506 transitions. [2020-12-22 07:09:17,160 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 11506 transitions. Word has length 115 [2020-12-22 07:09:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:17,160 INFO L481 AbstractCegarLoop]: Abstraction has 8471 states and 11506 transitions. [2020-12-22 07:09:17,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 11506 transitions. [2020-12-22 07:09:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:17,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:17,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:09:17,164 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -792560231, now seen corresponding path program 1 times [2020-12-22 07:09:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:17,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867514990] [2020-12-22 07:09:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:17,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867514990] [2020-12-22 07:09:17,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:17,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:17,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833620583] [2020-12-22 07:09:17,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:17,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:17,223 INFO L87 Difference]: Start difference. First operand 8471 states and 11506 transitions. Second operand 5 states. [2020-12-22 07:09:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:18,806 INFO L93 Difference]: Finished difference Result 28195 states and 38758 transitions. [2020-12-22 07:09:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:18,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:18,847 INFO L225 Difference]: With dead ends: 28195 [2020-12-22 07:09:18,847 INFO L226 Difference]: Without dead ends: 19787 [2020-12-22 07:09:18,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19787 states. [2020-12-22 07:09:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19787 to 8831. [2020-12-22 07:09:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8831 states. [2020-12-22 07:09:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 11866 transitions. [2020-12-22 07:09:19,730 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 11866 transitions. Word has length 115 [2020-12-22 07:09:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:19,730 INFO L481 AbstractCegarLoop]: Abstraction has 8831 states and 11866 transitions. [2020-12-22 07:09:19,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 11866 transitions. [2020-12-22 07:09:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:19,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:19,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:19,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:09:19,734 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash -751885481, now seen corresponding path program 1 times [2020-12-22 07:09:19,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:19,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217883905] [2020-12-22 07:09:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:19,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217883905] [2020-12-22 07:09:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:19,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:09:19,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84236872] [2020-12-22 07:09:19,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:09:19,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:09:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:19,797 INFO L87 Difference]: Start difference. First operand 8831 states and 11866 transitions. Second operand 3 states. [2020-12-22 07:09:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:21,138 INFO L93 Difference]: Finished difference Result 25256 states and 33975 transitions. [2020-12-22 07:09:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:09:21,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:09:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:21,168 INFO L225 Difference]: With dead ends: 25256 [2020-12-22 07:09:21,168 INFO L226 Difference]: Without dead ends: 16493 [2020-12-22 07:09:21,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:09:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2020-12-22 07:09:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 16453. [2020-12-22 07:09:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16453 states. [2020-12-22 07:09:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16453 states to 16453 states and 22035 transitions. [2020-12-22 07:09:22,754 INFO L78 Accepts]: Start accepts. Automaton has 16453 states and 22035 transitions. Word has length 115 [2020-12-22 07:09:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:22,754 INFO L481 AbstractCegarLoop]: Abstraction has 16453 states and 22035 transitions. [2020-12-22 07:09:22,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:09:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16453 states and 22035 transitions. [2020-12-22 07:09:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:22,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:22,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:22,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:09:22,757 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -649084234, now seen corresponding path program 1 times [2020-12-22 07:09:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:22,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209973472] [2020-12-22 07:09:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:22,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209973472] [2020-12-22 07:09:22,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:22,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:09:22,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366315861] [2020-12-22 07:09:22,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:09:22,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:09:22,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:09:22,812 INFO L87 Difference]: Start difference. First operand 16453 states and 22035 transitions. Second operand 5 states. [2020-12-22 07:09:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:24,862 INFO L93 Difference]: Finished difference Result 43629 states and 58901 transitions. [2020-12-22 07:09:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:09:24,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-12-22 07:09:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:24,898 INFO L225 Difference]: With dead ends: 43629 [2020-12-22 07:09:24,899 INFO L226 Difference]: Without dead ends: 27248 [2020-12-22 07:09:24,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:09:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27248 states. [2020-12-22 07:09:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27248 to 16810. [2020-12-22 07:09:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16810 states. [2020-12-22 07:09:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 22290 transitions. [2020-12-22 07:09:26,423 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 22290 transitions. Word has length 115 [2020-12-22 07:09:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:26,424 INFO L481 AbstractCegarLoop]: Abstraction has 16810 states and 22290 transitions. [2020-12-22 07:09:26,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:09:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 22290 transitions. [2020-12-22 07:09:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:26,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:26,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:26,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:09:26,427 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1130164492, now seen corresponding path program 1 times [2020-12-22 07:09:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088783932] [2020-12-22 07:09:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:26,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088783932] [2020-12-22 07:09:26,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:26,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:26,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766570164] [2020-12-22 07:09:26,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:26,482 INFO L87 Difference]: Start difference. First operand 16810 states and 22290 transitions. Second operand 4 states. [2020-12-22 07:09:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:28,838 INFO L93 Difference]: Finished difference Result 41177 states and 54534 transitions. [2020-12-22 07:09:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:28,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:28,867 INFO L225 Difference]: With dead ends: 41177 [2020-12-22 07:09:28,868 INFO L226 Difference]: Without dead ends: 24441 [2020-12-22 07:09:28,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24441 states. [2020-12-22 07:09:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24441 to 16810. [2020-12-22 07:09:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16810 states. [2020-12-22 07:09:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 22217 transitions. [2020-12-22 07:09:30,600 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 22217 transitions. Word has length 115 [2020-12-22 07:09:30,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:30,601 INFO L481 AbstractCegarLoop]: Abstraction has 16810 states and 22217 transitions. [2020-12-22 07:09:30,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 22217 transitions. [2020-12-22 07:09:30,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:30,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:30,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:30,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:09:30,604 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash 808997554, now seen corresponding path program 1 times [2020-12-22 07:09:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:30,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715469864] [2020-12-22 07:09:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:30,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715469864] [2020-12-22 07:09:30,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:30,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:30,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930487710] [2020-12-22 07:09:30,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:30,658 INFO L87 Difference]: Start difference. First operand 16810 states and 22217 transitions. Second operand 4 states. [2020-12-22 07:09:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:32,823 INFO L93 Difference]: Finished difference Result 43713 states and 57439 transitions. [2020-12-22 07:09:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:32,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:32,858 INFO L225 Difference]: With dead ends: 43713 [2020-12-22 07:09:32,858 INFO L226 Difference]: Without dead ends: 26978 [2020-12-22 07:09:32,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26978 states. [2020-12-22 07:09:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26978 to 19336. [2020-12-22 07:09:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19336 states. [2020-12-22 07:09:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19336 states to 19336 states and 25195 transitions. [2020-12-22 07:09:34,504 INFO L78 Accepts]: Start accepts. Automaton has 19336 states and 25195 transitions. Word has length 115 [2020-12-22 07:09:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:34,505 INFO L481 AbstractCegarLoop]: Abstraction has 19336 states and 25195 transitions. [2020-12-22 07:09:34,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 19336 states and 25195 transitions. [2020-12-22 07:09:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:34,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:34,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:34,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 07:09:34,507 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash 455909172, now seen corresponding path program 1 times [2020-12-22 07:09:34,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:34,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455349697] [2020-12-22 07:09:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:34,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455349697] [2020-12-22 07:09:34,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:34,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:34,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602733712] [2020-12-22 07:09:34,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:34,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:34,568 INFO L87 Difference]: Start difference. First operand 19336 states and 25195 transitions. Second operand 4 states. [2020-12-22 07:09:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:36,892 INFO L93 Difference]: Finished difference Result 47397 states and 61716 transitions. [2020-12-22 07:09:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:36,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:36,924 INFO L225 Difference]: With dead ends: 47397 [2020-12-22 07:09:36,924 INFO L226 Difference]: Without dead ends: 28199 [2020-12-22 07:09:36,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28199 states. [2020-12-22 07:09:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28199 to 19336. [2020-12-22 07:09:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19336 states. [2020-12-22 07:09:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19336 states to 19336 states and 25122 transitions. [2020-12-22 07:09:38,825 INFO L78 Accepts]: Start accepts. Automaton has 19336 states and 25122 transitions. Word has length 115 [2020-12-22 07:09:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:38,826 INFO L481 AbstractCegarLoop]: Abstraction has 19336 states and 25122 transitions. [2020-12-22 07:09:38,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19336 states and 25122 transitions. [2020-12-22 07:09:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:38,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:38,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:38,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:09:38,829 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1910785422, now seen corresponding path program 1 times [2020-12-22 07:09:38,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:38,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278610498] [2020-12-22 07:09:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:38,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278610498] [2020-12-22 07:09:38,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:38,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:38,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118191962] [2020-12-22 07:09:38,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:38,883 INFO L87 Difference]: Start difference. First operand 19336 states and 25122 transitions. Second operand 4 states. [2020-12-22 07:09:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:41,379 INFO L93 Difference]: Finished difference Result 46797 states and 60759 transitions. [2020-12-22 07:09:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:41,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:41,410 INFO L225 Difference]: With dead ends: 46797 [2020-12-22 07:09:41,410 INFO L226 Difference]: Without dead ends: 27603 [2020-12-22 07:09:41,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27603 states. [2020-12-22 07:09:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27603 to 18976. [2020-12-22 07:09:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18976 states. [2020-12-22 07:09:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 24449 transitions. [2020-12-22 07:09:43,083 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 24449 transitions. Word has length 115 [2020-12-22 07:09:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:43,084 INFO L481 AbstractCegarLoop]: Abstraction has 18976 states and 24449 transitions. [2020-12-22 07:09:43,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 24449 transitions. [2020-12-22 07:09:43,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:43,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:43,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:43,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 07:09:43,087 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:43,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1662638928, now seen corresponding path program 1 times [2020-12-22 07:09:43,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:43,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153577159] [2020-12-22 07:09:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:43,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153577159] [2020-12-22 07:09:43,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:43,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:43,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786460675] [2020-12-22 07:09:43,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:43,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:43,143 INFO L87 Difference]: Start difference. First operand 18976 states and 24449 transitions. Second operand 4 states. [2020-12-22 07:09:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:45,525 INFO L93 Difference]: Finished difference Result 45999 states and 59248 transitions. [2020-12-22 07:09:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:45,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:45,554 INFO L225 Difference]: With dead ends: 45999 [2020-12-22 07:09:45,555 INFO L226 Difference]: Without dead ends: 27166 [2020-12-22 07:09:45,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27166 states. [2020-12-22 07:09:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27166 to 18712. [2020-12-22 07:09:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18712 states. [2020-12-22 07:09:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18712 states to 18712 states and 23936 transitions. [2020-12-22 07:09:47,265 INFO L78 Accepts]: Start accepts. Automaton has 18712 states and 23936 transitions. Word has length 115 [2020-12-22 07:09:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:47,265 INFO L481 AbstractCegarLoop]: Abstraction has 18712 states and 23936 transitions. [2020-12-22 07:09:47,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18712 states and 23936 transitions. [2020-12-22 07:09:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:47,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:47,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:47,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 07:09:47,268 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1238992206, now seen corresponding path program 1 times [2020-12-22 07:09:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915956615] [2020-12-22 07:09:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:47,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915956615] [2020-12-22 07:09:47,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:47,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:47,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97855148] [2020-12-22 07:09:47,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:47,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:47,319 INFO L87 Difference]: Start difference. First operand 18712 states and 23936 transitions. Second operand 4 states. [2020-12-22 07:09:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:50,057 INFO L93 Difference]: Finished difference Result 50726 states and 64501 transitions. [2020-12-22 07:09:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:50,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:50,091 INFO L225 Difference]: With dead ends: 50726 [2020-12-22 07:09:50,091 INFO L226 Difference]: Without dead ends: 32095 [2020-12-22 07:09:50,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:50,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32095 states. [2020-12-22 07:09:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32095 to 23300. [2020-12-22 07:09:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23300 states. [2020-12-22 07:09:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23300 states to 23300 states and 29130 transitions. [2020-12-22 07:09:52,121 INFO L78 Accepts]: Start accepts. Automaton has 23300 states and 29130 transitions. Word has length 115 [2020-12-22 07:09:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:52,122 INFO L481 AbstractCegarLoop]: Abstraction has 23300 states and 29130 transitions. [2020-12-22 07:09:52,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23300 states and 29130 transitions. [2020-12-22 07:09:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:52,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:52,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:52,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 07:09:52,125 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1210607924, now seen corresponding path program 1 times [2020-12-22 07:09:52,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:52,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470199069] [2020-12-22 07:09:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:52,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470199069] [2020-12-22 07:09:52,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:52,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:52,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797951002] [2020-12-22 07:09:52,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:52,182 INFO L87 Difference]: Start difference. First operand 23300 states and 29130 transitions. Second operand 4 states. [2020-12-22 07:09:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:09:55,510 INFO L93 Difference]: Finished difference Result 55959 states and 69989 transitions. [2020-12-22 07:09:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:09:55,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:09:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:09:55,546 INFO L225 Difference]: With dead ends: 55959 [2020-12-22 07:09:55,546 INFO L226 Difference]: Without dead ends: 32921 [2020-12-22 07:09:55,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:09:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32921 states. [2020-12-22 07:09:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32921 to 22976. [2020-12-22 07:09:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22976 states. [2020-12-22 07:09:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 28517 transitions. [2020-12-22 07:09:57,766 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 28517 transitions. Word has length 115 [2020-12-22 07:09:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:09:57,766 INFO L481 AbstractCegarLoop]: Abstraction has 22976 states and 28517 transitions. [2020-12-22 07:09:57,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:09:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 28517 transitions. [2020-12-22 07:09:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:09:57,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:09:57,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:09:57,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 07:09:57,770 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:09:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:09:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash 181248626, now seen corresponding path program 1 times [2020-12-22 07:09:57,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:09:57,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801510544] [2020-12-22 07:09:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:09:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:09:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:09:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801510544] [2020-12-22 07:09:57,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:09:57,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:09:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486146230] [2020-12-22 07:09:57,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:09:57,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:09:57,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:09:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:09:57,833 INFO L87 Difference]: Start difference. First operand 22976 states and 28517 transitions. Second operand 4 states. [2020-12-22 07:10:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:01,018 INFO L93 Difference]: Finished difference Result 54847 states and 67953 transitions. [2020-12-22 07:10:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:01,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:10:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:01,055 INFO L225 Difference]: With dead ends: 54847 [2020-12-22 07:10:01,055 INFO L226 Difference]: Without dead ends: 32068 [2020-12-22 07:10:01,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32068 states. [2020-12-22 07:10:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32068 to 22016. [2020-12-22 07:10:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22016 states. [2020-12-22 07:10:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22016 states to 22016 states and 26844 transitions. [2020-12-22 07:10:03,134 INFO L78 Accepts]: Start accepts. Automaton has 22016 states and 26844 transitions. Word has length 115 [2020-12-22 07:10:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:03,134 INFO L481 AbstractCegarLoop]: Abstraction has 22016 states and 26844 transitions. [2020-12-22 07:10:03,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22016 states and 26844 transitions. [2020-12-22 07:10:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:10:03,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:03,136 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:03,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 07:10:03,136 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash 840780148, now seen corresponding path program 1 times [2020-12-22 07:10:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:03,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999771433] [2020-12-22 07:10:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:10:03,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999771433] [2020-12-22 07:10:03,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:03,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272878548] [2020-12-22 07:10:03,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:10:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:10:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:10:03,187 INFO L87 Difference]: Start difference. First operand 22016 states and 26844 transitions. Second operand 4 states. [2020-12-22 07:10:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:06,251 INFO L93 Difference]: Finished difference Result 52528 states and 64051 transitions. [2020-12-22 07:10:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:10:06,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 07:10:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:06,282 INFO L225 Difference]: With dead ends: 52528 [2020-12-22 07:10:06,282 INFO L226 Difference]: Without dead ends: 30764 [2020-12-22 07:10:06,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:10:06,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30764 states. [2020-12-22 07:10:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30764 to 21551. [2020-12-22 07:10:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21551 states. [2020-12-22 07:10:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21551 states to 21551 states and 25996 transitions. [2020-12-22 07:10:08,234 INFO L78 Accepts]: Start accepts. Automaton has 21551 states and 25996 transitions. Word has length 115 [2020-12-22 07:10:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:08,235 INFO L481 AbstractCegarLoop]: Abstraction has 21551 states and 25996 transitions. [2020-12-22 07:10:08,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:10:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 21551 states and 25996 transitions. [2020-12-22 07:10:08,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 07:10:08,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:08,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:08,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 07:10:08,238 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash 446413362, now seen corresponding path program 1 times [2020-12-22 07:10:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:08,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338451213] [2020-12-22 07:10:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:08,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338451213] [2020-12-22 07:10:08,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:08,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:08,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399339329] [2020-12-22 07:10:08,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:08,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:08,292 INFO L87 Difference]: Start difference. First operand 21551 states and 25996 transitions. Second operand 3 states. [2020-12-22 07:10:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:12,304 INFO L93 Difference]: Finished difference Result 62705 states and 75065 transitions. [2020-12-22 07:10:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:12,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 07:10:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:12,345 INFO L225 Difference]: With dead ends: 62705 [2020-12-22 07:10:12,345 INFO L226 Difference]: Without dead ends: 41406 [2020-12-22 07:10:12,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41406 states. [2020-12-22 07:10:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41406 to 41406. [2020-12-22 07:10:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41406 states. [2020-12-22 07:10:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41406 states to 41406 states and 49209 transitions. [2020-12-22 07:10:16,398 INFO L78 Accepts]: Start accepts. Automaton has 41406 states and 49209 transitions. Word has length 115 [2020-12-22 07:10:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:16,399 INFO L481 AbstractCegarLoop]: Abstraction has 41406 states and 49209 transitions. [2020-12-22 07:10:16,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 41406 states and 49209 transitions. [2020-12-22 07:10:16,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:16,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:16,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:16,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 07:10:16,404 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:16,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1549243033, now seen corresponding path program 1 times [2020-12-22 07:10:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:16,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660403725] [2020-12-22 07:10:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660403725] [2020-12-22 07:10:16,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:16,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:16,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339836952] [2020-12-22 07:10:16,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:16,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:16,469 INFO L87 Difference]: Start difference. First operand 41406 states and 49209 transitions. Second operand 3 states. [2020-12-22 07:10:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:23,465 INFO L93 Difference]: Finished difference Result 119490 states and 141709 transitions. [2020-12-22 07:10:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:23,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:23,567 INFO L225 Difference]: With dead ends: 119490 [2020-12-22 07:10:23,567 INFO L226 Difference]: Without dead ends: 78584 [2020-12-22 07:10:23,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78584 states. [2020-12-22 07:10:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78584 to 78580. [2020-12-22 07:10:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78580 states. [2020-12-22 07:10:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78580 states to 78580 states and 92881 transitions. [2020-12-22 07:10:31,319 INFO L78 Accepts]: Start accepts. Automaton has 78580 states and 92881 transitions. Word has length 116 [2020-12-22 07:10:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:31,320 INFO L481 AbstractCegarLoop]: Abstraction has 78580 states and 92881 transitions. [2020-12-22 07:10:31,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 78580 states and 92881 transitions. [2020-12-22 07:10:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 07:10:31,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:31,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:31,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-22 07:10:31,326 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1098361321, now seen corresponding path program 1 times [2020-12-22 07:10:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:31,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064287050] [2020-12-22 07:10:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:10:31,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064287050] [2020-12-22 07:10:31,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:31,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310681914] [2020-12-22 07:10:31,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:31,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:31,362 INFO L87 Difference]: Start difference. First operand 78580 states and 92881 transitions. Second operand 3 states. [2020-12-22 07:10:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:10:38,915 INFO L93 Difference]: Finished difference Result 156168 states and 184647 transitions. [2020-12-22 07:10:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:10:38,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 07:10:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:10:39,006 INFO L225 Difference]: With dead ends: 156168 [2020-12-22 07:10:39,007 INFO L226 Difference]: Without dead ends: 78088 [2020-12-22 07:10:39,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78088 states. [2020-12-22 07:10:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78088 to 78088. [2020-12-22 07:10:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78088 states. [2020-12-22 07:10:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78088 states to 78088 states and 92327 transitions. [2020-12-22 07:10:46,800 INFO L78 Accepts]: Start accepts. Automaton has 78088 states and 92327 transitions. Word has length 116 [2020-12-22 07:10:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:10:46,800 INFO L481 AbstractCegarLoop]: Abstraction has 78088 states and 92327 transitions. [2020-12-22 07:10:46,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:10:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 78088 states and 92327 transitions. [2020-12-22 07:10:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 07:10:46,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:10:46,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:10:46,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 07:10:46,804 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:10:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:10:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash -617979386, now seen corresponding path program 1 times [2020-12-22 07:10:46,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:10:46,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313580122] [2020-12-22 07:10:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:10:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:10:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:10:46,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313580122] [2020-12-22 07:10:46,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:10:46,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:10:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513473935] [2020-12-22 07:10:46,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:10:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:10:46,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:10:46,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:10:46,853 INFO L87 Difference]: Start difference. First operand 78088 states and 92327 transitions. Second operand 3 states. [2020-12-22 07:11:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:01,135 INFO L93 Difference]: Finished difference Result 229142 states and 270495 transitions. [2020-12-22 07:11:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:01,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 07:11:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:01,349 INFO L225 Difference]: With dead ends: 229142 [2020-12-22 07:11:01,350 INFO L226 Difference]: Without dead ends: 151554 [2020-12-22 07:11:01,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151554 states. [2020-12-22 07:11:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151554 to 148118. [2020-12-22 07:11:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148118 states. [2020-12-22 07:11:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148118 states to 148118 states and 174683 transitions. [2020-12-22 07:11:16,018 INFO L78 Accepts]: Start accepts. Automaton has 148118 states and 174683 transitions. Word has length 117 [2020-12-22 07:11:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:11:16,018 INFO L481 AbstractCegarLoop]: Abstraction has 148118 states and 174683 transitions. [2020-12-22 07:11:16,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:11:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 148118 states and 174683 transitions. [2020-12-22 07:11:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 07:11:16,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:11:16,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:11:16,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-22 07:11:16,025 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:11:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:11:16,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2029624968, now seen corresponding path program 1 times [2020-12-22 07:11:16,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:11:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435522109] [2020-12-22 07:11:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:11:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:11:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:11:16,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435522109] [2020-12-22 07:11:16,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:11:16,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:11:16,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125977931] [2020-12-22 07:11:16,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:11:16,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:11:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:11:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:16,060 INFO L87 Difference]: Start difference. First operand 148118 states and 174683 transitions. Second operand 3 states. [2020-12-22 07:11:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:11:30,630 INFO L93 Difference]: Finished difference Result 295460 states and 348489 transitions. [2020-12-22 07:11:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:11:30,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 07:11:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:11:31,009 INFO L225 Difference]: With dead ends: 295460 [2020-12-22 07:11:31,010 INFO L226 Difference]: Without dead ends: 147628 [2020-12-22 07:11:31,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:11:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147628 states.