/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.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:10:58,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:10:58,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:10:58,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:10:58,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:10:58,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:10:58,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:10:58,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:10:58,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:10:58,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:10:58,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:10:58,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:10:58,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:10:58,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:10:58,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:10:58,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:10:58,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:10:58,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:10:58,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:10:58,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:10:58,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:10:58,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:10:58,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:10:58,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:10:58,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:10:58,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:10:58,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:10:58,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:10:58,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:10:58,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:10:58,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:10:58,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:10:58,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:10:58,408 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:10:58,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:10:58,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:10:58,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:10:58,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:10:58,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:10:58,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:10:58,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:10:58,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:10:58,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:10:58,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:10:58,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:10:58,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:10:58,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:10:58,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:10:58,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:10:58,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:10:58,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:10:58,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:10:58,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:10:58,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:10:58,906 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:10:58,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:10:58,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3465dce12/9afa819c3ee646608089fece1befd552/FLAGa0939eb48 [2020-12-22 10:11:00,139 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:11:00,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:11:00,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3465dce12/9afa819c3ee646608089fece1befd552/FLAGa0939eb48 [2020-12-22 10:11:00,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3465dce12/9afa819c3ee646608089fece1befd552 [2020-12-22 10:11:00,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:11:00,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:11:00,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:00,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:11:00,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:11:00,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:00" (1/1) ... [2020-12-22 10:11:00,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237c2f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:00, skipping insertion in model container [2020-12-22 10:11:00,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:11:00" (1/1) ... [2020-12-22 10:11:00,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:11:00,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:11:01,400 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.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c[20609,20622] [2020-12-22 10:11:01,489 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.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c[25921,25934] [2020-12-22 10:11:02,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:02,532 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:11:02,581 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.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c[20609,20622] [2020-12-22 10:11:02,594 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.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c[25921,25934] [2020-12-22 10:11:03,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:11:03,316 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:11:03,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03 WrapperNode [2020-12-22 10:11:03,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:11:03,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:03,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:11:03,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:11:03,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:03,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:03,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:11:03,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:11:03,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:11:03,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:11:03,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:03,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:03,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:03,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:04,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:04,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:04,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... [2020-12-22 10:11:04,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:11:04,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:11:04,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:11:04,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:11:04,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:11:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:11:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:11:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:11:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:11:12,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:11:12,213 INFO L299 CfgBuilder]: Removed 40 assume(true) statements. [2020-12-22 10:11:12,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:11:12 BoogieIcfgContainer [2020-12-22 10:11:12,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:11:12,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:11:12,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:11:12,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:11:12,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:11:00" (1/3) ... [2020-12-22 10:11:12,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f141fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:11:12, skipping insertion in model container [2020-12-22 10:11:12,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:11:03" (2/3) ... [2020-12-22 10:11:12,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f141fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:11:12, skipping insertion in model container [2020-12-22 10:11:12,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:11:12" (3/3) ... [2020-12-22 10:11:12,227 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 10:11:12,234 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:11:12,240 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:11:12,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:11:12,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:11:12,297 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:11:12,297 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:11:12,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:11:12,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:11:12,298 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:11:12,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:11:12,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:11:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states. [2020-12-22 10:11:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:11:12,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:12,350 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] [2020-12-22 10:11:12,350 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2020-12-22 10:11:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:12,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479469514] [2020-12-22 10:11:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:12,699 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 10:11:12,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479469514] [2020-12-22 10:11:12,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:12,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:11:12,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578260941] [2020-12-22 10:11:12,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:11:12,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:11:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:11:12,731 INFO L87 Difference]: Start difference. First operand 945 states. Second operand 2 states. [2020-12-22 10:11:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:12,840 INFO L93 Difference]: Finished difference Result 1832 states and 3466 transitions. [2020-12-22 10:11:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:11:12,842 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2020-12-22 10:11:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:12,867 INFO L225 Difference]: With dead ends: 1832 [2020-12-22 10:11:12,867 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:11:12,875 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 10:11:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:11:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:11:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:11:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1655 transitions. [2020-12-22 10:11:13,013 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1655 transitions. Word has length 42 [2020-12-22 10:11:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:13,014 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1655 transitions. [2020-12-22 10:11:13,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:11:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1655 transitions. [2020-12-22 10:11:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 10:11:13,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:13,022 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] [2020-12-22 10:11:13,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:11:13,024 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2020-12-22 10:11:13,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:13,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321510481] [2020-12-22 10:11:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:13,247 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 10:11:13,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321510481] [2020-12-22 10:11:13,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:13,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:11:13,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155039209] [2020-12-22 10:11:13,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:11:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:11:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:11:13,252 INFO L87 Difference]: Start difference. First operand 879 states and 1655 transitions. Second operand 5 states. [2020-12-22 10:11:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:13,465 INFO L93 Difference]: Finished difference Result 952 states and 1769 transitions. [2020-12-22 10:11:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:11:13,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 10:11:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:13,474 INFO L225 Difference]: With dead ends: 952 [2020-12-22 10:11:13,474 INFO L226 Difference]: Without dead ends: 879 [2020-12-22 10:11:13,476 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 10:11:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-12-22 10:11:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2020-12-22 10:11:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-12-22 10:11:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1605 transitions. [2020-12-22 10:11:13,507 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1605 transitions. Word has length 42 [2020-12-22 10:11:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:13,507 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 1605 transitions. [2020-12-22 10:11:13,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:11:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1605 transitions. [2020-12-22 10:11:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:11:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:13,509 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 10:11:13,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:11:13,510 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -829720843, now seen corresponding path program 1 times [2020-12-22 10:11:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:13,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920547955] [2020-12-22 10:11:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:13,718 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 10:11:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920547955] [2020-12-22 10:11:13,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:13,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:11:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221359804] [2020-12-22 10:11:13,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:13,728 INFO L87 Difference]: Start difference. First operand 879 states and 1605 transitions. Second operand 3 states. [2020-12-22 10:11:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:21,907 INFO L93 Difference]: Finished difference Result 2383 states and 4478 transitions. [2020-12-22 10:11:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:21,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:11:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:21,918 INFO L225 Difference]: With dead ends: 2383 [2020-12-22 10:11:21,919 INFO L226 Difference]: Without dead ends: 1630 [2020-12-22 10:11:21,921 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 10:11:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2020-12-22 10:11:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1630. [2020-12-22 10:11:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 10:11:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2632 transitions. [2020-12-22 10:11:21,976 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2632 transitions. Word has length 48 [2020-12-22 10:11:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:21,976 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2632 transitions. [2020-12-22 10:11:21,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2632 transitions. [2020-12-22 10:11:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:21,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:21,980 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] [2020-12-22 10:11:21,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:11:21,980 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:21,981 INFO L82 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2020-12-22 10:11:21,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:21,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709369184] [2020-12-22 10:11:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:22,146 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 10:11:22,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709369184] [2020-12-22 10:11:22,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:22,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:22,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217397697] [2020-12-22 10:11:22,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:22,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:22,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:22,150 INFO L87 Difference]: Start difference. First operand 1630 states and 2632 transitions. Second operand 3 states. [2020-12-22 10:11:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:22,205 INFO L93 Difference]: Finished difference Result 1762 states and 2842 transitions. [2020-12-22 10:11:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:22,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:22,218 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 10:11:22,218 INFO L226 Difference]: Without dead ends: 1693 [2020-12-22 10:11:22,220 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 10:11:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2020-12-22 10:11:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2020-12-22 10:11:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1691 states. [2020-12-22 10:11:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2730 transitions. [2020-12-22 10:11:22,284 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2730 transitions. Word has length 91 [2020-12-22 10:11:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:22,285 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 2730 transitions. [2020-12-22 10:11:22,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2730 transitions. [2020-12-22 10:11:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:22,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:22,287 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] [2020-12-22 10:11:22,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:11:22,288 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2020-12-22 10:11:22,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:22,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822690287] [2020-12-22 10:11:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:22,414 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 10:11:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822690287] [2020-12-22 10:11:22,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:22,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:22,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665350034] [2020-12-22 10:11:22,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:22,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:22,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:22,417 INFO L87 Difference]: Start difference. First operand 1691 states and 2730 transitions. Second operand 3 states. [2020-12-22 10:11:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:22,497 INFO L93 Difference]: Finished difference Result 1939 states and 3126 transitions. [2020-12-22 10:11:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:22,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:22,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:22,514 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 10:11:22,515 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 10:11:22,516 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 10:11:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 10:11:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1807. [2020-12-22 10:11:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1807 states. [2020-12-22 10:11:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2915 transitions. [2020-12-22 10:11:22,603 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2915 transitions. Word has length 91 [2020-12-22 10:11:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:22,603 INFO L481 AbstractCegarLoop]: Abstraction has 1807 states and 2915 transitions. [2020-12-22 10:11:22,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2915 transitions. [2020-12-22 10:11:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:22,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:22,606 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] [2020-12-22 10:11:22,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:11:22,607 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2020-12-22 10:11:22,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:22,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241104747] [2020-12-22 10:11:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:22,787 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 10:11:22,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241104747] [2020-12-22 10:11:22,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:22,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294719884] [2020-12-22 10:11:22,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:22,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:22,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:22,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:22,792 INFO L87 Difference]: Start difference. First operand 1807 states and 2915 transitions. Second operand 3 states. [2020-12-22 10:11:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:22,853 INFO L93 Difference]: Finished difference Result 2275 states and 3661 transitions. [2020-12-22 10:11:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:22,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:22,868 INFO L225 Difference]: With dead ends: 2275 [2020-12-22 10:11:22,868 INFO L226 Difference]: Without dead ends: 2029 [2020-12-22 10:11:22,870 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 10:11:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-12-22 10:11:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2027. [2020-12-22 10:11:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2020-12-22 10:11:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 3263 transitions. [2020-12-22 10:11:22,953 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 3263 transitions. Word has length 91 [2020-12-22 10:11:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:22,955 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 3263 transitions. [2020-12-22 10:11:22,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 3263 transitions. [2020-12-22 10:11:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:22,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:22,957 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] [2020-12-22 10:11:22,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:11:22,958 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2020-12-22 10:11:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:22,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133200353] [2020-12-22 10:11:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:23,105 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 10:11:23,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133200353] [2020-12-22 10:11:23,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:23,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:23,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311583290] [2020-12-22 10:11:23,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:23,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:23,108 INFO L87 Difference]: Start difference. First operand 2027 states and 3263 transitions. Second operand 3 states. [2020-12-22 10:11:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:23,169 INFO L93 Difference]: Finished difference Result 2911 states and 4665 transitions. [2020-12-22 10:11:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:23,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:23,184 INFO L225 Difference]: With dead ends: 2911 [2020-12-22 10:11:23,185 INFO L226 Difference]: Without dead ends: 2445 [2020-12-22 10:11:23,188 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 10:11:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2020-12-22 10:11:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2443. [2020-12-22 10:11:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-12-22 10:11:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3915 transitions. [2020-12-22 10:11:23,272 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3915 transitions. Word has length 91 [2020-12-22 10:11:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:23,273 INFO L481 AbstractCegarLoop]: Abstraction has 2443 states and 3915 transitions. [2020-12-22 10:11:23,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3915 transitions. [2020-12-22 10:11:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:23,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:23,274 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] [2020-12-22 10:11:23,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:11:23,275 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2020-12-22 10:11:23,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:23,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344858139] [2020-12-22 10:11:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:23,387 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 10:11:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344858139] [2020-12-22 10:11:23,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:23,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669020425] [2020-12-22 10:11:23,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:23,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:23,391 INFO L87 Difference]: Start difference. First operand 2443 states and 3915 transitions. Second operand 3 states. [2020-12-22 10:11:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:23,488 INFO L93 Difference]: Finished difference Result 4111 states and 6541 transitions. [2020-12-22 10:11:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:23,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 10:11:23,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:23,510 INFO L225 Difference]: With dead ends: 4111 [2020-12-22 10:11:23,511 INFO L226 Difference]: Without dead ends: 3229 [2020-12-22 10:11:23,514 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 10:11:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2020-12-22 10:11:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3227. [2020-12-22 10:11:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3227 states. [2020-12-22 10:11:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 5131 transitions. [2020-12-22 10:11:23,642 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 5131 transitions. Word has length 91 [2020-12-22 10:11:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:23,642 INFO L481 AbstractCegarLoop]: Abstraction has 3227 states and 5131 transitions. [2020-12-22 10:11:23,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 5131 transitions. [2020-12-22 10:11:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 10:11:23,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:23,644 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] [2020-12-22 10:11:23,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:11:23,645 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2020-12-22 10:11:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689032396] [2020-12-22 10:11:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:23,902 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 10:11:23,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689032396] [2020-12-22 10:11:23,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:23,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:23,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24191457] [2020-12-22 10:11:23,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:23,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:23,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:23,905 INFO L87 Difference]: Start difference. First operand 3227 states and 5131 transitions. Second operand 9 states. [2020-12-22 10:11:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:25,304 INFO L93 Difference]: Finished difference Result 26551 states and 41657 transitions. [2020-12-22 10:11:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:11:25,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2020-12-22 10:11:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:25,420 INFO L225 Difference]: With dead ends: 26551 [2020-12-22 10:11:25,421 INFO L226 Difference]: Without dead ends: 24885 [2020-12-22 10:11:25,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:11:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24885 states. [2020-12-22 10:11:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24885 to 4891. [2020-12-22 10:11:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4891 states. [2020-12-22 10:11:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 7675 transitions. [2020-12-22 10:11:25,963 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 7675 transitions. Word has length 91 [2020-12-22 10:11:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:25,967 INFO L481 AbstractCegarLoop]: Abstraction has 4891 states and 7675 transitions. [2020-12-22 10:11:25,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 7675 transitions. [2020-12-22 10:11:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:25,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:25,969 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] [2020-12-22 10:11:25,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:11:25,970 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2020-12-22 10:11:25,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:25,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842154643] [2020-12-22 10:11:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:26,175 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 10:11:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842154643] [2020-12-22 10:11:26,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:26,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:26,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47904322] [2020-12-22 10:11:26,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:26,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:26,181 INFO L87 Difference]: Start difference. First operand 4891 states and 7675 transitions. Second operand 3 states. [2020-12-22 10:11:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:26,568 INFO L93 Difference]: Finished difference Result 11199 states and 17373 transitions. [2020-12-22 10:11:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:26,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:26,587 INFO L225 Difference]: With dead ends: 11199 [2020-12-22 10:11:26,588 INFO L226 Difference]: Without dead ends: 7869 [2020-12-22 10:11:26,596 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 10:11:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2020-12-22 10:11:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 7803. [2020-12-22 10:11:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:11:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11995 transitions. [2020-12-22 10:11:27,023 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11995 transitions. Word has length 93 [2020-12-22 10:11:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:27,023 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11995 transitions. [2020-12-22 10:11:27,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11995 transitions. [2020-12-22 10:11:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:27,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:27,025 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] [2020-12-22 10:11:27,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:11:27,026 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2020-12-22 10:11:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:27,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303614035] [2020-12-22 10:11:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:27,469 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 10:11:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303614035] [2020-12-22 10:11:27,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:27,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:27,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275150000] [2020-12-22 10:11:27,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:27,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:27,471 INFO L87 Difference]: Start difference. First operand 7803 states and 11995 transitions. Second operand 9 states. [2020-12-22 10:11:27,858 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 10:11:28,023 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 10:11:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:28,714 INFO L93 Difference]: Finished difference Result 14047 states and 21469 transitions. [2020-12-22 10:11:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:28,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 93 [2020-12-22 10:11:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:28,734 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 10:11:28,734 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 10:11:28,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:11:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 10:11:29,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2020-12-22 10:11:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2020-12-22 10:11:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11931 transitions. [2020-12-22 10:11:29,165 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11931 transitions. Word has length 93 [2020-12-22 10:11:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:29,165 INFO L481 AbstractCegarLoop]: Abstraction has 7803 states and 11931 transitions. [2020-12-22 10:11:29,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:11:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11931 transitions. [2020-12-22 10:11:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 10:11:29,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:29,167 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] [2020-12-22 10:11:29,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:11:29,167 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2020-12-22 10:11:29,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:29,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936614937] [2020-12-22 10:11:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:29,257 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 10:11:29,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936614937] [2020-12-22 10:11:29,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:29,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:29,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841649618] [2020-12-22 10:11:29,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:29,259 INFO L87 Difference]: Start difference. First operand 7803 states and 11931 transitions. Second operand 3 states. [2020-12-22 10:11:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:29,937 INFO L93 Difference]: Finished difference Result 19519 states and 29469 transitions. [2020-12-22 10:11:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:29,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 93 [2020-12-22 10:11:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:29,972 INFO L225 Difference]: With dead ends: 19519 [2020-12-22 10:11:29,972 INFO L226 Difference]: Without dead ends: 13277 [2020-12-22 10:11:29,984 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 10:11:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2020-12-22 10:11:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13275. [2020-12-22 10:11:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13275 states. [2020-12-22 10:11:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 19931 transitions. [2020-12-22 10:11:30,750 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 19931 transitions. Word has length 93 [2020-12-22 10:11:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:30,751 INFO L481 AbstractCegarLoop]: Abstraction has 13275 states and 19931 transitions. [2020-12-22 10:11:30,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 19931 transitions. [2020-12-22 10:11:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 10:11:30,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:30,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:30,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:11:30,753 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2020-12-22 10:11:30,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:30,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828751680] [2020-12-22 10:11:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:30,913 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 10:11:30,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828751680] [2020-12-22 10:11:30,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:30,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:11:30,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483183834] [2020-12-22 10:11:30,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:11:30,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:11:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:11:30,916 INFO L87 Difference]: Start difference. First operand 13275 states and 19931 transitions. Second operand 8 states. [2020-12-22 10:11:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:32,472 INFO L93 Difference]: Finished difference Result 22017 states and 32715 transitions. [2020-12-22 10:11:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:11:32,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2020-12-22 10:11:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:32,518 INFO L225 Difference]: With dead ends: 22017 [2020-12-22 10:11:32,519 INFO L226 Difference]: Without dead ends: 22015 [2020-12-22 10:11:32,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22015 states. [2020-12-22 10:11:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22015 to 13659. [2020-12-22 10:11:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13659 states. [2020-12-22 10:11:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 20251 transitions. [2020-12-22 10:11:33,684 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 20251 transitions. Word has length 94 [2020-12-22 10:11:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:33,684 INFO L481 AbstractCegarLoop]: Abstraction has 13659 states and 20251 transitions. [2020-12-22 10:11:33,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:11:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 20251 transitions. [2020-12-22 10:11:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 10:11:33,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:33,686 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] [2020-12-22 10:11:33,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:11:33,687 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2020-12-22 10:11:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:33,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48254669] [2020-12-22 10:11:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:33,752 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 10:11:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48254669] [2020-12-22 10:11:33,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:33,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057829104] [2020-12-22 10:11:33,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:11:33,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:11:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:11:33,755 INFO L87 Difference]: Start difference. First operand 13659 states and 20251 transitions. Second operand 3 states. [2020-12-22 10:11:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:34,659 INFO L93 Difference]: Finished difference Result 25954 states and 38433 transitions. [2020-12-22 10:11:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:11:34,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 10:11:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:34,700 INFO L225 Difference]: With dead ends: 25954 [2020-12-22 10:11:34,700 INFO L226 Difference]: Without dead ends: 19295 [2020-12-22 10:11:34,714 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 10:11:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2020-12-22 10:11:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19293. [2020-12-22 10:11:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19293 states. [2020-12-22 10:11:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19293 states to 19293 states and 28381 transitions. [2020-12-22 10:11:36,262 INFO L78 Accepts]: Start accepts. Automaton has 19293 states and 28381 transitions. Word has length 95 [2020-12-22 10:11:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:36,263 INFO L481 AbstractCegarLoop]: Abstraction has 19293 states and 28381 transitions. [2020-12-22 10:11:36,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:11:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19293 states and 28381 transitions. [2020-12-22 10:11:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 10:11:36,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:36,268 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 10:11:36,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:11:36,269 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1023590464, now seen corresponding path program 1 times [2020-12-22 10:11:36,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:36,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48606307] [2020-12-22 10:11:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:36,474 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 10:11:36,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48606307] [2020-12-22 10:11:36,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:36,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:11:36,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98451130] [2020-12-22 10:11:36,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:11:36,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:11:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:11:36,476 INFO L87 Difference]: Start difference. First operand 19293 states and 28381 transitions. Second operand 4 states. [2020-12-22 10:11:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:48,847 INFO L93 Difference]: Finished difference Result 22338 states and 33346 transitions. [2020-12-22 10:11:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:11:48,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 10:11:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:48,890 INFO L225 Difference]: With dead ends: 22338 [2020-12-22 10:11:48,891 INFO L226 Difference]: Without dead ends: 20797 [2020-12-22 10:11:48,899 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 10:11:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20797 states. [2020-12-22 10:11:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20797 to 20795. [2020-12-22 10:11:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20795 states. [2020-12-22 10:11:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29950 transitions. [2020-12-22 10:11:50,049 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29950 transitions. Word has length 119 [2020-12-22 10:11:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:50,050 INFO L481 AbstractCegarLoop]: Abstraction has 20795 states and 29950 transitions. [2020-12-22 10:11:50,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:11:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29950 transitions. [2020-12-22 10:11:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:11:50,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:50,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:11:50,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:11:50,062 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash 388249298, now seen corresponding path program 1 times [2020-12-22 10:11:50,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:50,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558812372] [2020-12-22 10:11:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:50,265 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 10:11:50,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558812372] [2020-12-22 10:11:50,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:11:50,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:11:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463888701] [2020-12-22 10:11:50,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:11:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:11:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:11:50,267 INFO L87 Difference]: Start difference. First operand 20795 states and 29950 transitions. Second operand 9 states. [2020-12-22 10:11:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:56,786 INFO L93 Difference]: Finished difference Result 148363 states and 215814 transitions. [2020-12-22 10:11:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:11:56,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:11:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:57,014 INFO L225 Difference]: With dead ends: 148363 [2020-12-22 10:11:57,015 INFO L226 Difference]: Without dead ends: 130633 [2020-12-22 10:11:57,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:11:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130633 states. [2020-12-22 10:12:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130633 to 38523. [2020-12-22 10:12:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38523 states. [2020-12-22 10:12:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38523 states to 38523 states and 55614 transitions. [2020-12-22 10:12:00,522 INFO L78 Accepts]: Start accepts. Automaton has 38523 states and 55614 transitions. Word has length 129 [2020-12-22 10:12:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:00,523 INFO L481 AbstractCegarLoop]: Abstraction has 38523 states and 55614 transitions. [2020-12-22 10:12:00,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 38523 states and 55614 transitions. [2020-12-22 10:12:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:00,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:00,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:00,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:12:00,537 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1380533518, now seen corresponding path program 1 times [2020-12-22 10:12:00,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:00,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592128562] [2020-12-22 10:12:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:00,737 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 10:12:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592128562] [2020-12-22 10:12:00,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:00,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:00,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677849864] [2020-12-22 10:12:00,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:00,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:00,739 INFO L87 Difference]: Start difference. First operand 38523 states and 55614 transitions. Second operand 9 states. [2020-12-22 10:12:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:09,744 INFO L93 Difference]: Finished difference Result 166091 states and 241478 transitions. [2020-12-22 10:12:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:09,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:10,190 INFO L225 Difference]: With dead ends: 166091 [2020-12-22 10:12:10,190 INFO L226 Difference]: Without dead ends: 148361 [2020-12-22 10:12:10,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148361 states. [2020-12-22 10:12:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148361 to 65147. [2020-12-22 10:12:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65147 states. [2020-12-22 10:12:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65147 states to 65147 states and 93950 transitions. [2020-12-22 10:12:15,483 INFO L78 Accepts]: Start accepts. Automaton has 65147 states and 93950 transitions. Word has length 129 [2020-12-22 10:12:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:15,484 INFO L481 AbstractCegarLoop]: Abstraction has 65147 states and 93950 transitions. [2020-12-22 10:12:15,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 65147 states and 93950 transitions. [2020-12-22 10:12:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:15,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:15,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:15,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:12:15,501 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash -248893678, now seen corresponding path program 1 times [2020-12-22 10:12:15,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:15,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133090547] [2020-12-22 10:12:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:15,750 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 10:12:15,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133090547] [2020-12-22 10:12:15,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:15,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968806508] [2020-12-22 10:12:15,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:15,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:15,753 INFO L87 Difference]: Start difference. First operand 65147 states and 93950 transitions. Second operand 9 states. [2020-12-22 10:12:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:26,233 INFO L93 Difference]: Finished difference Result 183819 states and 267142 transitions. [2020-12-22 10:12:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:26,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:26,472 INFO L225 Difference]: With dead ends: 183819 [2020-12-22 10:12:26,472 INFO L226 Difference]: Without dead ends: 166089 [2020-12-22 10:12:26,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166089 states. [2020-12-22 10:12:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166089 to 82875. [2020-12-22 10:12:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82875 states. [2020-12-22 10:12:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82875 states to 82875 states and 119614 transitions. [2020-12-22 10:12:33,259 INFO L78 Accepts]: Start accepts. Automaton has 82875 states and 119614 transitions. Word has length 129 [2020-12-22 10:12:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:33,259 INFO L481 AbstractCegarLoop]: Abstraction has 82875 states and 119614 transitions. [2020-12-22 10:12:33,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 82875 states and 119614 transitions. [2020-12-22 10:12:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:33,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:33,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:33,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:12:33,273 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:33,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1484352718, now seen corresponding path program 1 times [2020-12-22 10:12:33,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:33,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136482699] [2020-12-22 10:12:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:33,500 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 10:12:33,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136482699] [2020-12-22 10:12:33,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:33,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:33,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524623473] [2020-12-22 10:12:33,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:33,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:33,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:33,502 INFO L87 Difference]: Start difference. First operand 82875 states and 119614 transitions. Second operand 9 states. [2020-12-22 10:12:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:12:46,536 INFO L93 Difference]: Finished difference Result 201547 states and 292806 transitions. [2020-12-22 10:12:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:12:46,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:12:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:12:46,954 INFO L225 Difference]: With dead ends: 201547 [2020-12-22 10:12:46,954 INFO L226 Difference]: Without dead ends: 183817 [2020-12-22 10:12:46,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:12:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183817 states. [2020-12-22 10:12:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183817 to 100603. [2020-12-22 10:12:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100603 states. [2020-12-22 10:12:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100603 states to 100603 states and 145278 transitions. [2020-12-22 10:12:55,496 INFO L78 Accepts]: Start accepts. Automaton has 100603 states and 145278 transitions. Word has length 129 [2020-12-22 10:12:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:12:55,497 INFO L481 AbstractCegarLoop]: Abstraction has 100603 states and 145278 transitions. [2020-12-22 10:12:55,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:12:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 100603 states and 145278 transitions. [2020-12-22 10:12:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:12:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:12:55,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:12:55,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:12:55,510 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:12:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:12:55,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1389619026, now seen corresponding path program 1 times [2020-12-22 10:12:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:12:55,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222295478] [2020-12-22 10:12:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:12:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:12:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 10:12:55,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222295478] [2020-12-22 10:12:55,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:12:55,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:12:55,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371666472] [2020-12-22 10:12:55,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:12:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:12:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:12:55,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:12:55,732 INFO L87 Difference]: Start difference. First operand 100603 states and 145278 transitions. Second operand 9 states. [2020-12-22 10:13:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:11,656 INFO L93 Difference]: Finished difference Result 219275 states and 318470 transitions. [2020-12-22 10:13:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:11,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:12,007 INFO L225 Difference]: With dead ends: 219275 [2020-12-22 10:13:12,007 INFO L226 Difference]: Without dead ends: 201545 [2020-12-22 10:13:12,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201545 states. [2020-12-22 10:13:22,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201545 to 118331. [2020-12-22 10:13:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118331 states. [2020-12-22 10:13:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118331 states to 118331 states and 170942 transitions. [2020-12-22 10:13:22,716 INFO L78 Accepts]: Start accepts. Automaton has 118331 states and 170942 transitions. Word has length 129 [2020-12-22 10:13:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:22,716 INFO L481 AbstractCegarLoop]: Abstraction has 118331 states and 170942 transitions. [2020-12-22 10:13:22,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 118331 states and 170942 transitions. [2020-12-22 10:13:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 10:13:22,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:22,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:22,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:13:22,733 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:22,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash 375573628, now seen corresponding path program 1 times [2020-12-22 10:13:22,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:22,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151574722] [2020-12-22 10:13:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 10:13:22,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151574722] [2020-12-22 10:13:22,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:22,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:13:22,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471685296] [2020-12-22 10:13:22,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:13:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:13:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:13:22,966 INFO L87 Difference]: Start difference. First operand 118331 states and 170942 transitions. Second operand 9 states. [2020-12-22 10:13:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:13:42,660 INFO L93 Difference]: Finished difference Result 237003 states and 344134 transitions. [2020-12-22 10:13:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:13:42,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2020-12-22 10:13:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:13:43,237 INFO L225 Difference]: With dead ends: 237003 [2020-12-22 10:13:43,237 INFO L226 Difference]: Without dead ends: 219273 [2020-12-22 10:13:43,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:13:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219273 states. [2020-12-22 10:13:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219273 to 136059. [2020-12-22 10:13:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136059 states. [2020-12-22 10:13:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136059 states to 136059 states and 196606 transitions. [2020-12-22 10:13:56,461 INFO L78 Accepts]: Start accepts. Automaton has 136059 states and 196606 transitions. Word has length 129 [2020-12-22 10:13:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:13:56,461 INFO L481 AbstractCegarLoop]: Abstraction has 136059 states and 196606 transitions. [2020-12-22 10:13:56,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:13:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 136059 states and 196606 transitions. [2020-12-22 10:13:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:13:56,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:13:56,481 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:13:56,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:13:56,482 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:13:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:13:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1903775542, now seen corresponding path program 1 times [2020-12-22 10:13:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:13:56,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876721479] [2020-12-22 10:13:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:13:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:13:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:13:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876721479] [2020-12-22 10:13:56,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:13:56,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:13:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595557990] [2020-12-22 10:13:56,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:13:56,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:13:56,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:13:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:13:56,907 INFO L87 Difference]: Start difference. First operand 136059 states and 196606 transitions. Second operand 3 states. [2020-12-22 10:14:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:05,558 INFO L93 Difference]: Finished difference Result 228260 states and 331053 transitions. [2020-12-22 10:14:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:05,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2020-12-22 10:14:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:05,682 INFO L225 Difference]: With dead ends: 228260 [2020-12-22 10:14:05,682 INFO L226 Difference]: Without dead ends: 95266 [2020-12-22 10:14:05,747 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 10:14:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95266 states. [2020-12-22 10:14:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95266 to 95264. [2020-12-22 10:14:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95264 states. [2020-12-22 10:14:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95264 states to 95264 states and 137578 transitions. [2020-12-22 10:14:14,536 INFO L78 Accepts]: Start accepts. Automaton has 95264 states and 137578 transitions. Word has length 131 [2020-12-22 10:14:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:14,536 INFO L481 AbstractCegarLoop]: Abstraction has 95264 states and 137578 transitions. [2020-12-22 10:14:14,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:14:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 95264 states and 137578 transitions. [2020-12-22 10:14:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 10:14:14,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:14,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:14:14,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:14:14,547 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash -800734569, now seen corresponding path program 1 times [2020-12-22 10:14:14,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:14,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111724] [2020-12-22 10:14:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:14:14,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111724] [2020-12-22 10:14:14,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:14,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 10:14:14,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286507805] [2020-12-22 10:14:14,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:14:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:14:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:14:14,779 INFO L87 Difference]: Start difference. First operand 95264 states and 137578 transitions. Second operand 9 states. [2020-12-22 10:14:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:31,673 INFO L93 Difference]: Finished difference Result 181296 states and 263026 transitions. [2020-12-22 10:14:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:14:31,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-12-22 10:14:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:32,032 INFO L225 Difference]: With dead ends: 181296 [2020-12-22 10:14:32,032 INFO L226 Difference]: Without dead ends: 169006 [2020-12-22 10:14:32,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:14:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169006 states. [2020-12-22 10:14:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169006 to 107552. [2020-12-22 10:14:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107552 states. [2020-12-22 10:14:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107552 states to 107552 states and 155370 transitions. [2020-12-22 10:14:43,219 INFO L78 Accepts]: Start accepts. Automaton has 107552 states and 155370 transitions. Word has length 131 [2020-12-22 10:14:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:14:43,220 INFO L481 AbstractCegarLoop]: Abstraction has 107552 states and 155370 transitions. [2020-12-22 10:14:43,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:14:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 107552 states and 155370 transitions. [2020-12-22 10:14:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 10:14:43,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:14:43,233 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] [2020-12-22 10:14:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:14:43,233 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:14:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:14:43,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1473709455, now seen corresponding path program 1 times [2020-12-22 10:14:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:14:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244801376] [2020-12-22 10:14:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:14:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:14:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:14:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244801376] [2020-12-22 10:14:43,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:14:43,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:14:43,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889204095] [2020-12-22 10:14:43,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:14:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:14:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:14:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:14:43,315 INFO L87 Difference]: Start difference. First operand 107552 states and 155370 transitions. Second operand 3 states. [2020-12-22 10:14:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:14:49,086 INFO L93 Difference]: Finished difference Result 159780 states and 230988 transitions. [2020-12-22 10:14:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:14:49,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 10:14:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:14:49,146 INFO L225 Difference]: With dead ends: 159780 [2020-12-22 10:14:49,146 INFO L226 Difference]: Without dead ends: 55330 [2020-12-22 10:14:49,200 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 10:14:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55330 states.