/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/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:20:01,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:20:01,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:20:01,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:20:01,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:20:01,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:20:01,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:20:01,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:20:01,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:20:01,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:20:01,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:20:01,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:20:01,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:20:01,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:20:01,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:20:01,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:20:01,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:20:01,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:20:01,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:20:01,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:20:01,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:20:01,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:20:01,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:20:01,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:20:01,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:20:01,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:20:01,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:20:01,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:20:01,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:20:01,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:20:01,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:20:01,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:20:01,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:20:01,357 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:20:01,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:20:01,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:20:01,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:20:01,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:20:01,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:20:01,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:20:01,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:20:01,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:20:01,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:20:01,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:20:01,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:20:01,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:20:01,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:20:01,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:20:01,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:20:01,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:20:01,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:20:01,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:20:01,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:20:01,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:20:01,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:20:01,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:20:01,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:20:01,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:20:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:20:01,769 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:20:01,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:20:01,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aba9917b/b08a1d923af14797a5428f5e0e1a7c4b/FLAG67ce125bb [2020-12-22 10:20:02,865 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:20:02,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:20:02,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aba9917b/b08a1d923af14797a5428f5e0e1a7c4b/FLAG67ce125bb [2020-12-22 10:20:03,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aba9917b/b08a1d923af14797a5428f5e0e1a7c4b [2020-12-22 10:20:03,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:20:03,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:20:03,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:03,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:20:03,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:20:03,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:03" (1/1) ... [2020-12-22 10:20:03,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb23e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:03, skipping insertion in model container [2020-12-22 10:20:03,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:20:03" (1/1) ... [2020-12-22 10:20:03,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:20:03,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:20:04,206 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/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[26912,26925] [2020-12-22 10:20:04,253 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/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[32224,32237] [2020-12-22 10:20:05,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:05,175 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:20:05,303 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/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[26912,26925] [2020-12-22 10:20:05,314 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/combinations/pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c[32224,32237] [2020-12-22 10:20:05,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:20:05,973 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:20:05,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05 WrapperNode [2020-12-22 10:20:05,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:20:05,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:05,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:20:05,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:20:05,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:20:06,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:20:06,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:20:06,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:20:06,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:06,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:07,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:07,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (1/1) ... [2020-12-22 10:20:07,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:20:07,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:20:07,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:20:07,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:20:07,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (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 10:20:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:20:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:20:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:20:07,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:20:12,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:20:12,767 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2020-12-22 10:20:12,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:12 BoogieIcfgContainer [2020-12-22 10:20:12,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:20:12,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:20:12,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:20:12,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:20:12,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:20:03" (1/3) ... [2020-12-22 10:20:12,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7478e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:12, skipping insertion in model container [2020-12-22 10:20:12,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:20:05" (2/3) ... [2020-12-22 10:20:12,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7478e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:20:12, skipping insertion in model container [2020-12-22 10:20:12,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:20:12" (3/3) ... [2020-12-22 10:20:12,780 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:20:12,787 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:20:12,793 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:20:12,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:20:12,848 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:20:12,848 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:20:12,848 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:20:12,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:20:12,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:20:12,849 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:20:12,849 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:20:12,849 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:20:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states. [2020-12-22 10:20:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:12,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:12,895 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] [2020-12-22 10:20:12,896 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:12,902 INFO L82 PathProgramCache]: Analyzing trace with hash -805214309, now seen corresponding path program 1 times [2020-12-22 10:20:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:12,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748899435] [2020-12-22 10:20:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:13,295 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 10:20:13,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748899435] [2020-12-22 10:20:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:20:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447430218] [2020-12-22 10:20:13,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:20:13,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:20:13,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:20:13,326 INFO L87 Difference]: Start difference. First operand 964 states. Second operand 2 states. [2020-12-22 10:20:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:13,427 INFO L93 Difference]: Finished difference Result 1859 states and 3514 transitions. [2020-12-22 10:20:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:20:13,429 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 46 [2020-12-22 10:20:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:13,470 INFO L225 Difference]: With dead ends: 1859 [2020-12-22 10:20:13,471 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:20:13,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:20:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:20:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:20:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:20:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1690 transitions. [2020-12-22 10:20:13,605 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1690 transitions. Word has length 46 [2020-12-22 10:20:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:13,606 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1690 transitions. [2020-12-22 10:20:13,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:20:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1690 transitions. [2020-12-22 10:20:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 10:20:13,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:13,615 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] [2020-12-22 10:20:13,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:20:13,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2020-12-22 10:20:13,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:13,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262571921] [2020-12-22 10:20:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:13,841 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 10:20:13,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262571921] [2020-12-22 10:20:13,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:13,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:20:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571334977] [2020-12-22 10:20:13,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:20:13,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:20:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:20:13,848 INFO L87 Difference]: Start difference. First operand 898 states and 1690 transitions. Second operand 5 states. [2020-12-22 10:20:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:14,016 INFO L93 Difference]: Finished difference Result 979 states and 1817 transitions. [2020-12-22 10:20:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:20:14,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-12-22 10:20:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:14,023 INFO L225 Difference]: With dead ends: 979 [2020-12-22 10:20:14,024 INFO L226 Difference]: Without dead ends: 898 [2020-12-22 10:20:14,025 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 10:20:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-12-22 10:20:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2020-12-22 10:20:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-12-22 10:20:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1629 transitions. [2020-12-22 10:20:14,062 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1629 transitions. Word has length 46 [2020-12-22 10:20:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:14,062 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1629 transitions. [2020-12-22 10:20:14,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:20:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1629 transitions. [2020-12-22 10:20:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:20:14,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:14,065 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] [2020-12-22 10:20:14,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:20:14,066 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash 90921877, now seen corresponding path program 1 times [2020-12-22 10:20:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:14,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017335616] [2020-12-22 10:20:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:14,169 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 10:20:14,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017335616] [2020-12-22 10:20:14,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:14,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:20:14,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808032954] [2020-12-22 10:20:14,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:14,178 INFO L87 Difference]: Start difference. First operand 898 states and 1629 transitions. Second operand 3 states. [2020-12-22 10:20:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:19,213 INFO L93 Difference]: Finished difference Result 2402 states and 4502 transitions. [2020-12-22 10:20:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:19,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:20:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:19,224 INFO L225 Difference]: With dead ends: 2402 [2020-12-22 10:20:19,224 INFO L226 Difference]: Without dead ends: 1649 [2020-12-22 10:20:19,226 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 10:20:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2020-12-22 10:20:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2020-12-22 10:20:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2020-12-22 10:20:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2656 transitions. [2020-12-22 10:20:19,272 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2656 transitions. Word has length 48 [2020-12-22 10:20:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:19,272 INFO L481 AbstractCegarLoop]: Abstraction has 1649 states and 2656 transitions. [2020-12-22 10:20:19,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2656 transitions. [2020-12-22 10:20:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:19,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:19,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:19,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:20:19,276 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2020-12-22 10:20:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:19,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951806942] [2020-12-22 10:20:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:19,472 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 10:20:19,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951806942] [2020-12-22 10:20:19,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:19,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:19,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200371502] [2020-12-22 10:20:19,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:19,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:19,475 INFO L87 Difference]: Start difference. First operand 1649 states and 2656 transitions. Second operand 3 states. [2020-12-22 10:20:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:19,519 INFO L93 Difference]: Finished difference Result 1797 states and 2892 transitions. [2020-12-22 10:20:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:19,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:19,531 INFO L225 Difference]: With dead ends: 1797 [2020-12-22 10:20:19,531 INFO L226 Difference]: Without dead ends: 1720 [2020-12-22 10:20:19,532 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 10:20:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2020-12-22 10:20:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1718. [2020-12-22 10:20:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 10:20:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2767 transitions. [2020-12-22 10:20:19,575 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2767 transitions. Word has length 106 [2020-12-22 10:20:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:19,576 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2767 transitions. [2020-12-22 10:20:19,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2767 transitions. [2020-12-22 10:20:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:19,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:19,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:19,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:20:19,578 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2020-12-22 10:20:19,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:19,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327977511] [2020-12-22 10:20:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:19,726 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 10:20:19,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327977511] [2020-12-22 10:20:19,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:19,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53577712] [2020-12-22 10:20:19,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:19,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:19,730 INFO L87 Difference]: Start difference. First operand 1718 states and 2767 transitions. Second operand 3 states. [2020-12-22 10:20:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:19,777 INFO L93 Difference]: Finished difference Result 1998 states and 3215 transitions. [2020-12-22 10:20:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:19,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:19,789 INFO L225 Difference]: With dead ends: 1998 [2020-12-22 10:20:19,789 INFO L226 Difference]: Without dead ends: 1852 [2020-12-22 10:20:19,790 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 10:20:19,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2020-12-22 10:20:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1850. [2020-12-22 10:20:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1850 states. [2020-12-22 10:20:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2978 transitions. [2020-12-22 10:20:19,844 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2978 transitions. Word has length 106 [2020-12-22 10:20:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:19,844 INFO L481 AbstractCegarLoop]: Abstraction has 1850 states and 2978 transitions. [2020-12-22 10:20:19,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2978 transitions. [2020-12-22 10:20:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:19,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:19,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:19,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:20:19,852 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2020-12-22 10:20:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:19,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907493934] [2020-12-22 10:20:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:20,007 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 10:20:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907493934] [2020-12-22 10:20:20,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:20,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:20,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428082573] [2020-12-22 10:20:20,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:20,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:20,011 INFO L87 Difference]: Start difference. First operand 1850 states and 2978 transitions. Second operand 3 states. [2020-12-22 10:20:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:20,069 INFO L93 Difference]: Finished difference Result 2382 states and 3828 transitions. [2020-12-22 10:20:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:20,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,083 INFO L225 Difference]: With dead ends: 2382 [2020-12-22 10:20:20,083 INFO L226 Difference]: Without dead ends: 2104 [2020-12-22 10:20:20,085 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 10:20:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2020-12-22 10:20:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2102. [2020-12-22 10:20:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2020-12-22 10:20:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3378 transitions. [2020-12-22 10:20:20,163 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3378 transitions. Word has length 106 [2020-12-22 10:20:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:20,164 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 3378 transitions. [2020-12-22 10:20:20,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3378 transitions. [2020-12-22 10:20:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:20,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:20,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:20,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:20:20,168 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2020-12-22 10:20:20,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:20,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364970659] [2020-12-22 10:20:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:20,350 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 10:20:20,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364970659] [2020-12-22 10:20:20,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:20,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:20,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126040478] [2020-12-22 10:20:20,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:20,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:20,354 INFO L87 Difference]: Start difference. First operand 2102 states and 3378 transitions. Second operand 3 states. [2020-12-22 10:20:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:20,419 INFO L93 Difference]: Finished difference Result 3114 states and 4988 transitions. [2020-12-22 10:20:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:20,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,436 INFO L225 Difference]: With dead ends: 3114 [2020-12-22 10:20:20,436 INFO L226 Difference]: Without dead ends: 2584 [2020-12-22 10:20:20,439 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 10:20:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2020-12-22 10:20:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2582. [2020-12-22 10:20:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2582 states. [2020-12-22 10:20:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2582 states to 2582 states and 4134 transitions. [2020-12-22 10:20:20,522 INFO L78 Accepts]: Start accepts. Automaton has 2582 states and 4134 transitions. Word has length 106 [2020-12-22 10:20:20,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:20,522 INFO L481 AbstractCegarLoop]: Abstraction has 2582 states and 4134 transitions. [2020-12-22 10:20:20,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2582 states and 4134 transitions. [2020-12-22 10:20:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:20,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:20,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:20,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:20:20,525 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2020-12-22 10:20:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:20,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107547977] [2020-12-22 10:20:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:20,625 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 10:20:20,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107547977] [2020-12-22 10:20:20,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:20,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002689650] [2020-12-22 10:20:20,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:20,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:20,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:20,628 INFO L87 Difference]: Start difference. First operand 2582 states and 4134 transitions. Second operand 3 states. [2020-12-22 10:20:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:20,718 INFO L93 Difference]: Finished difference Result 4506 states and 7176 transitions. [2020-12-22 10:20:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:20,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:20,738 INFO L225 Difference]: With dead ends: 4506 [2020-12-22 10:20:20,739 INFO L226 Difference]: Without dead ends: 3496 [2020-12-22 10:20:20,742 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 10:20:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2020-12-22 10:20:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3494. [2020-12-22 10:20:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3494 states. [2020-12-22 10:20:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 5558 transitions. [2020-12-22 10:20:20,858 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 5558 transitions. Word has length 106 [2020-12-22 10:20:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:20,858 INFO L481 AbstractCegarLoop]: Abstraction has 3494 states and 5558 transitions. [2020-12-22 10:20:20,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 5558 transitions. [2020-12-22 10:20:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:20,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:20,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:20:20,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:20,862 INFO L82 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2020-12-22 10:20:20,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:20,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293679412] [2020-12-22 10:20:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:20,961 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 10:20:20,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293679412] [2020-12-22 10:20:20,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:20,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154676697] [2020-12-22 10:20:20,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:20,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:20,965 INFO L87 Difference]: Start difference. First operand 3494 states and 5558 transitions. Second operand 3 states. [2020-12-22 10:20:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:21,157 INFO L93 Difference]: Finished difference Result 7146 states and 11288 transitions. [2020-12-22 10:20:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:21,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:21,196 INFO L225 Difference]: With dead ends: 7146 [2020-12-22 10:20:21,197 INFO L226 Difference]: Without dead ends: 5224 [2020-12-22 10:20:21,203 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 10:20:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2020-12-22 10:20:21,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5222. [2020-12-22 10:20:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5222 states. [2020-12-22 10:20:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 8230 transitions. [2020-12-22 10:20:21,506 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 8230 transitions. Word has length 106 [2020-12-22 10:20:21,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:21,507 INFO L481 AbstractCegarLoop]: Abstraction has 5222 states and 8230 transitions. [2020-12-22 10:20:21,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 8230 transitions. [2020-12-22 10:20:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:21,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:21,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:21,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:20:21,510 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2020-12-22 10:20:21,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:21,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396918675] [2020-12-22 10:20:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:21,627 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 10:20:21,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396918675] [2020-12-22 10:20:21,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:21,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351994582] [2020-12-22 10:20:21,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:21,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:21,632 INFO L87 Difference]: Start difference. First operand 5222 states and 8230 transitions. Second operand 3 states. [2020-12-22 10:20:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:21,914 INFO L93 Difference]: Finished difference Result 12138 states and 18984 transitions. [2020-12-22 10:20:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:21,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 10:20:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:21,974 INFO L225 Difference]: With dead ends: 12138 [2020-12-22 10:20:21,975 INFO L226 Difference]: Without dead ends: 8488 [2020-12-22 10:20:21,983 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 10:20:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8488 states. [2020-12-22 10:20:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8488 to 8486. [2020-12-22 10:20:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8486 states. [2020-12-22 10:20:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8486 states to 8486 states and 13222 transitions. [2020-12-22 10:20:22,485 INFO L78 Accepts]: Start accepts. Automaton has 8486 states and 13222 transitions. Word has length 106 [2020-12-22 10:20:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:22,486 INFO L481 AbstractCegarLoop]: Abstraction has 8486 states and 13222 transitions. [2020-12-22 10:20:22,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8486 states and 13222 transitions. [2020-12-22 10:20:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 10:20:22,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:22,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:22,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:20:22,488 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2020-12-22 10:20:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:22,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297587397] [2020-12-22 10:20:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:22,710 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 10:20:22,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297587397] [2020-12-22 10:20:22,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:22,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557054650] [2020-12-22 10:20:22,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:22,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:22,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:22,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:22,713 INFO L87 Difference]: Start difference. First operand 8486 states and 13222 transitions. Second operand 10 states. [2020-12-22 10:20:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:27,429 INFO L93 Difference]: Finished difference Result 119110 states and 184246 transitions. [2020-12-22 10:20:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:20:27,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 10:20:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:27,733 INFO L225 Difference]: With dead ends: 119110 [2020-12-22 10:20:27,733 INFO L226 Difference]: Without dead ends: 112196 [2020-12-22 10:20:27,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:20:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112196 states. [2020-12-22 10:20:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112196 to 15398. [2020-12-22 10:20:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2020-12-22 10:20:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 23654 transitions. [2020-12-22 10:20:30,200 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 23654 transitions. Word has length 106 [2020-12-22 10:20:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:30,201 INFO L481 AbstractCegarLoop]: Abstraction has 15398 states and 23654 transitions. [2020-12-22 10:20:30,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 23654 transitions. [2020-12-22 10:20:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:30,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:30,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:30,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:20:30,203 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:30,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2020-12-22 10:20:30,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:30,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188447832] [2020-12-22 10:20:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:30,309 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 10:20:30,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188447832] [2020-12-22 10:20:30,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:30,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680923272] [2020-12-22 10:20:30,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:30,312 INFO L87 Difference]: Start difference. First operand 15398 states and 23654 transitions. Second operand 3 states. [2020-12-22 10:20:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:31,709 INFO L93 Difference]: Finished difference Result 41642 states and 63464 transitions. [2020-12-22 10:20:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:31,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 10:20:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:31,762 INFO L225 Difference]: With dead ends: 41642 [2020-12-22 10:20:31,762 INFO L226 Difference]: Without dead ends: 27816 [2020-12-22 10:20:31,781 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 10:20:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27816 states. [2020-12-22 10:20:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27816 to 27558. [2020-12-22 10:20:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:20:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41446 transitions. [2020-12-22 10:20:33,159 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41446 transitions. Word has length 108 [2020-12-22 10:20:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:33,159 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41446 transitions. [2020-12-22 10:20:33,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41446 transitions. [2020-12-22 10:20:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 10:20:33,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:33,161 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:33,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:20:33,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2020-12-22 10:20:33,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:33,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794532560] [2020-12-22 10:20:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:33,518 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 10:20:33,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794532560] [2020-12-22 10:20:33,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:33,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:20:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181897337] [2020-12-22 10:20:33,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:20:33,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:33,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:20:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:20:33,520 INFO L87 Difference]: Start difference. First operand 27558 states and 41446 transitions. Second operand 10 states. [2020-12-22 10:20:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:35,522 INFO L93 Difference]: Finished difference Result 53546 states and 80360 transitions. [2020-12-22 10:20:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:35,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 108 [2020-12-22 10:20:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:35,587 INFO L225 Difference]: With dead ends: 53546 [2020-12-22 10:20:35,587 INFO L226 Difference]: Without dead ends: 27560 [2020-12-22 10:20:35,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:20:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27560 states. [2020-12-22 10:20:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27560 to 27558. [2020-12-22 10:20:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:20:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 41190 transitions. [2020-12-22 10:20:37,122 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 41190 transitions. Word has length 108 [2020-12-22 10:20:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:37,128 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 41190 transitions. [2020-12-22 10:20:37,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:20:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 41190 transitions. [2020-12-22 10:20:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:37,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:37,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:37,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:20:37,132 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2020-12-22 10:20:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:37,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025958377] [2020-12-22 10:20:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:37,280 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 10:20:37,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025958377] [2020-12-22 10:20:37,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:37,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:20:37,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599974907] [2020-12-22 10:20:37,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:20:37,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:20:37,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:20:37,282 INFO L87 Difference]: Start difference. First operand 27558 states and 41190 transitions. Second operand 6 states. [2020-12-22 10:20:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:38,951 INFO L93 Difference]: Finished difference Result 53544 states and 79847 transitions. [2020-12-22 10:20:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:20:38,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2020-12-22 10:20:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:39,004 INFO L225 Difference]: With dead ends: 53544 [2020-12-22 10:20:39,004 INFO L226 Difference]: Without dead ends: 27558 [2020-12-22 10:20:39,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:20:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27558 states. [2020-12-22 10:20:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27558 to 27558. [2020-12-22 10:20:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27558 states. [2020-12-22 10:20:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27558 states to 27558 states and 40934 transitions. [2020-12-22 10:20:40,685 INFO L78 Accepts]: Start accepts. Automaton has 27558 states and 40934 transitions. Word has length 109 [2020-12-22 10:20:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:40,685 INFO L481 AbstractCegarLoop]: Abstraction has 27558 states and 40934 transitions. [2020-12-22 10:20:40,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:20:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 27558 states and 40934 transitions. [2020-12-22 10:20:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 10:20:40,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:40,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:20:40,687 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2020-12-22 10:20:40,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:40,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174325405] [2020-12-22 10:20:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:40,830 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 10:20:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174325405] [2020-12-22 10:20:40,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:40,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:20:40,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324176566] [2020-12-22 10:20:40,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:20:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:20:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:20:40,832 INFO L87 Difference]: Start difference. First operand 27558 states and 40934 transitions. Second operand 8 states. [2020-12-22 10:20:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:43,524 INFO L93 Difference]: Finished difference Result 46928 states and 69147 transitions. [2020-12-22 10:20:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:20:43,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2020-12-22 10:20:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:43,588 INFO L225 Difference]: With dead ends: 46928 [2020-12-22 10:20:43,588 INFO L226 Difference]: Without dead ends: 46926 [2020-12-22 10:20:43,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:20:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46926 states. [2020-12-22 10:20:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46926 to 28326. [2020-12-22 10:20:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28326 states. [2020-12-22 10:20:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28326 states to 28326 states and 41574 transitions. [2020-12-22 10:20:45,696 INFO L78 Accepts]: Start accepts. Automaton has 28326 states and 41574 transitions. Word has length 109 [2020-12-22 10:20:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:45,697 INFO L481 AbstractCegarLoop]: Abstraction has 28326 states and 41574 transitions. [2020-12-22 10:20:45,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:20:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28326 states and 41574 transitions. [2020-12-22 10:20:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 10:20:45,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:45,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:45,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:20:45,709 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2020-12-22 10:20:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:45,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684611192] [2020-12-22 10:20:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:45,789 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 10:20:45,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684611192] [2020-12-22 10:20:45,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:45,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837337762] [2020-12-22 10:20:45,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:20:45,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:45,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:20:45,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:20:45,791 INFO L87 Difference]: Start difference. First operand 28326 states and 41574 transitions. Second operand 3 states. [2020-12-22 10:20:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:20:48,328 INFO L93 Difference]: Finished difference Result 55469 states and 81516 transitions. [2020-12-22 10:20:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:20:48,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 10:20:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:20:48,386 INFO L225 Difference]: With dead ends: 55469 [2020-12-22 10:20:48,386 INFO L226 Difference]: Without dead ends: 40874 [2020-12-22 10:20:48,404 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 10:20:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40874 states. [2020-12-22 10:20:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40874 to 40872. [2020-12-22 10:20:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40872 states. [2020-12-22 10:20:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40872 states to 40872 states and 59624 transitions. [2020-12-22 10:20:51,067 INFO L78 Accepts]: Start accepts. Automaton has 40872 states and 59624 transitions. Word has length 110 [2020-12-22 10:20:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:20:51,067 INFO L481 AbstractCegarLoop]: Abstraction has 40872 states and 59624 transitions. [2020-12-22 10:20:51,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:20:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40872 states and 59624 transitions. [2020-12-22 10:20:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 10:20:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:20:51,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:20:51,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:20:51,069 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:20:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:20:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 775234275, now seen corresponding path program 1 times [2020-12-22 10:20:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:20:51,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795740252] [2020-12-22 10:20:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:20:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:20:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:20:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795740252] [2020-12-22 10:20:51,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:20:51,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:20:51,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464782777] [2020-12-22 10:20:51,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:20:51,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:20:51,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:20:51,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:20:51,225 INFO L87 Difference]: Start difference. First operand 40872 states and 59624 transitions. Second operand 4 states. [2020-12-22 10:21:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:00,273 INFO L93 Difference]: Finished difference Result 43917 states and 64589 transitions. [2020-12-22 10:21:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:21:00,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 10:21:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:00,318 INFO L225 Difference]: With dead ends: 43917 [2020-12-22 10:21:00,318 INFO L226 Difference]: Without dead ends: 42376 [2020-12-22 10:21:00,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:21:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2020-12-22 10:21:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 42374. [2020-12-22 10:21:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42374 states. [2020-12-22 10:21:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42374 states to 42374 states and 61193 transitions. [2020-12-22 10:21:02,957 INFO L78 Accepts]: Start accepts. Automaton has 42374 states and 61193 transitions. Word has length 119 [2020-12-22 10:21:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:02,958 INFO L481 AbstractCegarLoop]: Abstraction has 42374 states and 61193 transitions. [2020-12-22 10:21:02,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:21:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 42374 states and 61193 transitions. [2020-12-22 10:21:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:21:02,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:02,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:02,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:21:02,980 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash 45078639, now seen corresponding path program 1 times [2020-12-22 10:21:02,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:02,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745726993] [2020-12-22 10:21:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 10:21:03,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745726993] [2020-12-22 10:21:03,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:03,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:03,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323354661] [2020-12-22 10:21:03,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:03,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:03,193 INFO L87 Difference]: Start difference. First operand 42374 states and 61193 transitions. Second operand 10 states. [2020-12-22 10:21:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:21,780 INFO L93 Difference]: Finished difference Result 364312 states and 528530 transitions. [2020-12-22 10:21:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:21,781 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:21:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:22,317 INFO L225 Difference]: With dead ends: 364312 [2020-12-22 10:21:22,318 INFO L226 Difference]: Without dead ends: 325014 [2020-12-22 10:21:22,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325014 states. [2020-12-22 10:21:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325014 to 81670. [2020-12-22 10:21:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81670 states. [2020-12-22 10:21:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81670 states to 81670 states and 117897 transitions. [2020-12-22 10:21:30,267 INFO L78 Accepts]: Start accepts. Automaton has 81670 states and 117897 transitions. Word has length 148 [2020-12-22 10:21:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:21:30,267 INFO L481 AbstractCegarLoop]: Abstraction has 81670 states and 117897 transitions. [2020-12-22 10:21:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:21:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 81670 states and 117897 transitions. [2020-12-22 10:21:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:21:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:21:30,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:21:30,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:21:30,292 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:21:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:21:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1723704177, now seen corresponding path program 1 times [2020-12-22 10:21:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:21:30,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125785498] [2020-12-22 10:21:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:21:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:21:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:21:30,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125785498] [2020-12-22 10:21:30,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:21:30,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:21:30,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807827325] [2020-12-22 10:21:30,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:21:30,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:21:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:21:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:21:30,547 INFO L87 Difference]: Start difference. First operand 81670 states and 117897 transitions. Second operand 10 states. [2020-12-22 10:21:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:21:54,420 INFO L93 Difference]: Finished difference Result 403608 states and 585234 transitions. [2020-12-22 10:21:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:21:54,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:21:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:21:55,198 INFO L225 Difference]: With dead ends: 403608 [2020-12-22 10:21:55,198 INFO L226 Difference]: Without dead ends: 364310 [2020-12-22 10:21:55,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:21:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364310 states. [2020-12-22 10:22:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364310 to 140678. [2020-12-22 10:22:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140678 states. [2020-12-22 10:22:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140678 states to 140678 states and 202633 transitions. [2020-12-22 10:22:07,983 INFO L78 Accepts]: Start accepts. Automaton has 140678 states and 202633 transitions. Word has length 148 [2020-12-22 10:22:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:07,984 INFO L481 AbstractCegarLoop]: Abstraction has 140678 states and 202633 transitions. [2020-12-22 10:22:07,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 140678 states and 202633 transitions. [2020-12-22 10:22:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:22:08,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:08,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:08,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:22:08,013 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -592064337, now seen corresponding path program 1 times [2020-12-22 10:22:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:08,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491378088] [2020-12-22 10:22:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 10:22:08,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491378088] [2020-12-22 10:22:08,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:08,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:08,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096868394] [2020-12-22 10:22:08,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:08,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:08,275 INFO L87 Difference]: Start difference. First operand 140678 states and 202633 transitions. Second operand 10 states. [2020-12-22 10:22:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:22:37,570 INFO L93 Difference]: Finished difference Result 442904 states and 641938 transitions. [2020-12-22 10:22:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:22:37,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:22:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:22:38,437 INFO L225 Difference]: With dead ends: 442904 [2020-12-22 10:22:38,437 INFO L226 Difference]: Without dead ends: 403606 [2020-12-22 10:22:38,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:22:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403606 states. [2020-12-22 10:22:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403606 to 179974. [2020-12-22 10:22:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179974 states. [2020-12-22 10:22:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179974 states to 179974 states and 259337 transitions. [2020-12-22 10:22:55,789 INFO L78 Accepts]: Start accepts. Automaton has 179974 states and 259337 transitions. Word has length 148 [2020-12-22 10:22:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:22:55,790 INFO L481 AbstractCegarLoop]: Abstraction has 179974 states and 259337 transitions. [2020-12-22 10:22:55,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:22:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 179974 states and 259337 transitions. [2020-12-22 10:22:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 10:22:55,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:22:55,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:22:55,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:22:55,830 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:22:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:22:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1827523377, now seen corresponding path program 1 times [2020-12-22 10:22:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:22:55,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487528154] [2020-12-22 10:22:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:22:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:22:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:22:56,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487528154] [2020-12-22 10:22:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:22:56,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 10:22:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448009314] [2020-12-22 10:22:56,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:22:56,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:22:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:22:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:22:56,045 INFO L87 Difference]: Start difference. First operand 179974 states and 259337 transitions. Second operand 10 states. [2020-12-22 10:23:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:23:32,056 INFO L93 Difference]: Finished difference Result 482200 states and 698642 transitions. [2020-12-22 10:23:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:23:32,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 148 [2020-12-22 10:23:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:23:32,833 INFO L225 Difference]: With dead ends: 482200 [2020-12-22 10:23:32,833 INFO L226 Difference]: Without dead ends: 442902 [2020-12-22 10:23:32,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:23:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442902 states.