/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:20:25,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:20:25,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:20:25,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:20:25,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:20:25,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:20:25,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:20:25,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:20:25,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:20:25,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:20:25,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:20:25,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:20:25,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:20:25,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:20:25,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:20:25,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:20:25,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:20:25,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:20:25,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:20:25,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:20:25,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:20:25,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:20:25,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:20:25,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:20:25,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:20:25,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:20:25,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:20:25,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:20:25,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:20:25,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:20:25,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:20:25,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:20:25,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:20:25,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:20:25,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:20:25,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:20:25,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:20:25,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:20:25,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:20:25,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:20:25,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:20:25,823 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:20:25,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:20:25,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:20:25,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:20:25,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:20:25,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:20:25,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:20:25,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:20:25,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:20:25,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:20:25,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:20:25,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:20:25,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:20:25,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:20:25,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:20:25,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:20:25,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:20:25,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:20:25,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:20:25,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:20:25,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:20:25,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:20:26,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:20:26,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:20:26,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:20:26,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:20:26,305 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:20:26,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:20:26,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad56d236/fd0856c85a544934b2ecfd568e69522a/FLAGd26c8ba39 [2020-12-22 08:20:27,132 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:20:27,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:20:27,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad56d236/fd0856c85a544934b2ecfd568e69522a/FLAGd26c8ba39 [2020-12-22 08:20:27,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad56d236/fd0856c85a544934b2ecfd568e69522a [2020-12-22 08:20:27,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:20:27,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:20:27,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:20:27,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:20:27,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:20:27,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:27" (1/1) ... [2020-12-22 08:20:27,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad09fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:27, skipping insertion in model container [2020-12-22 08:20:27,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:20:27" (1/1) ... [2020-12-22 08:20:27,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:20:27,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:20:27,723 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6759,6772] [2020-12-22 08:20:27,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:20:27,858 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:20:27,980 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6759,6772] [2020-12-22 08:20:28,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:20:28,052 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:20:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28 WrapperNode [2020-12-22 08:20:28,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:20:28,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:20:28,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:20:28,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:20:28,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:20:28,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:20:28,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:20:28,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:20:28,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... [2020-12-22 08:20:28,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:20:28,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:20:28,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:20:28,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:20:28,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:20:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:20:28,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:20:28,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:20:28,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:20:29,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:20:29,291 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:20:29,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:29 BoogieIcfgContainer [2020-12-22 08:20:29,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:20:29,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:20:29,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:20:29,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:20:29,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:20:27" (1/3) ... [2020-12-22 08:20:29,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b45c925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:29, skipping insertion in model container [2020-12-22 08:20:29,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:20:28" (2/3) ... [2020-12-22 08:20:29,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b45c925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:20:29, skipping insertion in model container [2020-12-22 08:20:29,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:20:29" (3/3) ... [2020-12-22 08:20:29,304 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:20:29,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:20:29,322 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:20:29,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:20:29,372 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:20:29,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:20:29,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:20:29,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:20:29,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:20:29,373 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:20:29,374 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:20:29,374 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:20:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2020-12-22 08:20:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:20:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:29,406 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] [2020-12-22 08:20:29,406 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash 293786216, now seen corresponding path program 1 times [2020-12-22 08:20:29,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:29,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233857757] [2020-12-22 08:20:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:29,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233857757] [2020-12-22 08:20:29,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:29,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:29,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367700724] [2020-12-22 08:20:29,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:29,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:29,816 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 3 states. [2020-12-22 08:20:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:29,963 INFO L93 Difference]: Finished difference Result 308 states and 501 transitions. [2020-12-22 08:20:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:29,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:20:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:29,981 INFO L225 Difference]: With dead ends: 308 [2020-12-22 08:20:29,981 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 08:20:29,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 08:20:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2020-12-22 08:20:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-22 08:20:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 350 transitions. [2020-12-22 08:20:30,084 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 350 transitions. Word has length 49 [2020-12-22 08:20:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:30,088 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 350 transitions. [2020-12-22 08:20:30,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 350 transitions. [2020-12-22 08:20:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:20:30,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:30,092 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] [2020-12-22 08:20:30,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:20:30,093 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:30,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1697275801, now seen corresponding path program 1 times [2020-12-22 08:20:30,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:30,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062472920] [2020-12-22 08:20:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062472920] [2020-12-22 08:20:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7188355] [2020-12-22 08:20:30,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:30,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,311 INFO L87 Difference]: Start difference. First operand 233 states and 350 transitions. Second operand 3 states. [2020-12-22 08:20:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:30,428 INFO L93 Difference]: Finished difference Result 571 states and 877 transitions. [2020-12-22 08:20:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:30,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:20:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:30,438 INFO L225 Difference]: With dead ends: 571 [2020-12-22 08:20:30,439 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 08:20:30,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 08:20:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2020-12-22 08:20:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-12-22 08:20:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 590 transitions. [2020-12-22 08:20:30,529 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 590 transitions. Word has length 52 [2020-12-22 08:20:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:30,531 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 590 transitions. [2020-12-22 08:20:30,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 590 transitions. [2020-12-22 08:20:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:20:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:30,535 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] [2020-12-22 08:20:30,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:20:30,535 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -195371450, now seen corresponding path program 1 times [2020-12-22 08:20:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:30,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287614958] [2020-12-22 08:20:30,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:30,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287614958] [2020-12-22 08:20:30,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:30,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:30,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297980789] [2020-12-22 08:20:30,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,661 INFO L87 Difference]: Start difference. First operand 393 states and 590 transitions. Second operand 3 states. [2020-12-22 08:20:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:30,735 INFO L93 Difference]: Finished difference Result 975 states and 1485 transitions. [2020-12-22 08:20:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:30,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:20:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:30,741 INFO L225 Difference]: With dead ends: 975 [2020-12-22 08:20:30,741 INFO L226 Difference]: Without dead ends: 681 [2020-12-22 08:20:30,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-12-22 08:20:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 679. [2020-12-22 08:20:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-12-22 08:20:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1013 transitions. [2020-12-22 08:20:30,809 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1013 transitions. Word has length 52 [2020-12-22 08:20:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:30,810 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 1013 transitions. [2020-12-22 08:20:30,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1013 transitions. [2020-12-22 08:20:30,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:20:30,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:30,817 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] [2020-12-22 08:20:30,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:20:30,818 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1046972601, now seen corresponding path program 1 times [2020-12-22 08:20:30,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:30,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965855981] [2020-12-22 08:20:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:30,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965855981] [2020-12-22 08:20:30,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:30,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484390360] [2020-12-22 08:20:30,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:30,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:30,936 INFO L87 Difference]: Start difference. First operand 679 states and 1013 transitions. Second operand 3 states. [2020-12-22 08:20:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:31,078 INFO L93 Difference]: Finished difference Result 1661 states and 2497 transitions. [2020-12-22 08:20:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:31,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:20:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:31,090 INFO L225 Difference]: With dead ends: 1661 [2020-12-22 08:20:31,090 INFO L226 Difference]: Without dead ends: 1165 [2020-12-22 08:20:31,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-12-22 08:20:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1163. [2020-12-22 08:20:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2020-12-22 08:20:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1710 transitions. [2020-12-22 08:20:31,181 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1710 transitions. Word has length 52 [2020-12-22 08:20:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:31,182 INFO L481 AbstractCegarLoop]: Abstraction has 1163 states and 1710 transitions. [2020-12-22 08:20:31,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1710 transitions. [2020-12-22 08:20:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:20:31,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:31,196 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] [2020-12-22 08:20:31,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:20:31,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1633425885, now seen corresponding path program 1 times [2020-12-22 08:20:31,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:31,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372679033] [2020-12-22 08:20:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:31,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372679033] [2020-12-22 08:20:31,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:31,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:20:31,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683557291] [2020-12-22 08:20:31,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:31,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:31,326 INFO L87 Difference]: Start difference. First operand 1163 states and 1710 transitions. Second operand 5 states. [2020-12-22 08:20:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:31,788 INFO L93 Difference]: Finished difference Result 2777 states and 4090 transitions. [2020-12-22 08:20:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:31,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:20:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:31,799 INFO L225 Difference]: With dead ends: 2777 [2020-12-22 08:20:31,799 INFO L226 Difference]: Without dead ends: 1641 [2020-12-22 08:20:31,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2020-12-22 08:20:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1627. [2020-12-22 08:20:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2020-12-22 08:20:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2372 transitions. [2020-12-22 08:20:31,919 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2372 transitions. Word has length 53 [2020-12-22 08:20:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 1627 states and 2372 transitions. [2020-12-22 08:20:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2372 transitions. [2020-12-22 08:20:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:20:31,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:31,923 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] [2020-12-22 08:20:31,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:20:31,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1286312845, now seen corresponding path program 1 times [2020-12-22 08:20:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:31,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618861897] [2020-12-22 08:20:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:32,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618861897] [2020-12-22 08:20:32,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:32,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:32,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625328469] [2020-12-22 08:20:32,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:32,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:32,074 INFO L87 Difference]: Start difference. First operand 1627 states and 2372 transitions. Second operand 5 states. [2020-12-22 08:20:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:32,449 INFO L93 Difference]: Finished difference Result 5214 states and 7711 transitions. [2020-12-22 08:20:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:32,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:20:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:32,474 INFO L225 Difference]: With dead ends: 5214 [2020-12-22 08:20:32,474 INFO L226 Difference]: Without dead ends: 4156 [2020-12-22 08:20:32,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2020-12-22 08:20:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 1944. [2020-12-22 08:20:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1944 states. [2020-12-22 08:20:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2849 transitions. [2020-12-22 08:20:32,659 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2849 transitions. Word has length 53 [2020-12-22 08:20:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:32,659 INFO L481 AbstractCegarLoop]: Abstraction has 1944 states and 2849 transitions. [2020-12-22 08:20:32,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2849 transitions. [2020-12-22 08:20:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:20:32,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:32,662 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] [2020-12-22 08:20:32,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:20:32,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1015763425, now seen corresponding path program 1 times [2020-12-22 08:20:32,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:32,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594934742] [2020-12-22 08:20:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:32,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594934742] [2020-12-22 08:20:32,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:32,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205960384] [2020-12-22 08:20:32,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:20:32,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:20:32,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:32,782 INFO L87 Difference]: Start difference. First operand 1944 states and 2849 transitions. Second operand 6 states. [2020-12-22 08:20:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:33,448 INFO L93 Difference]: Finished difference Result 5969 states and 8769 transitions. [2020-12-22 08:20:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:33,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:20:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:33,472 INFO L225 Difference]: With dead ends: 5969 [2020-12-22 08:20:33,473 INFO L226 Difference]: Without dead ends: 4106 [2020-12-22 08:20:33,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:20:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-12-22 08:20:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4072. [2020-12-22 08:20:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4072 states. [2020-12-22 08:20:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 5957 transitions. [2020-12-22 08:20:33,890 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 5957 transitions. Word has length 53 [2020-12-22 08:20:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:33,891 INFO L481 AbstractCegarLoop]: Abstraction has 4072 states and 5957 transitions. [2020-12-22 08:20:33,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:20:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 5957 transitions. [2020-12-22 08:20:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:20:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:33,920 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] [2020-12-22 08:20:33,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:20:33,920 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2014010067, now seen corresponding path program 1 times [2020-12-22 08:20:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:33,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144087399] [2020-12-22 08:20:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144087399] [2020-12-22 08:20:34,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:34,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393293980] [2020-12-22 08:20:34,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:34,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:34,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:34,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:34,073 INFO L87 Difference]: Start difference. First operand 4072 states and 5957 transitions. Second operand 5 states. [2020-12-22 08:20:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:34,948 INFO L93 Difference]: Finished difference Result 12557 states and 18475 transitions. [2020-12-22 08:20:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:34,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:20:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:35,000 INFO L225 Difference]: With dead ends: 12557 [2020-12-22 08:20:35,001 INFO L226 Difference]: Without dead ends: 10017 [2020-12-22 08:20:35,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10017 states. [2020-12-22 08:20:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10017 to 4892. [2020-12-22 08:20:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4892 states. [2020-12-22 08:20:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 7194 transitions. [2020-12-22 08:20:35,546 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 7194 transitions. Word has length 54 [2020-12-22 08:20:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:35,547 INFO L481 AbstractCegarLoop]: Abstraction has 4892 states and 7194 transitions. [2020-12-22 08:20:35,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 7194 transitions. [2020-12-22 08:20:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:20:35,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:35,549 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] [2020-12-22 08:20:35,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:20:35,550 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash -697153037, now seen corresponding path program 1 times [2020-12-22 08:20:35,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:35,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462088907] [2020-12-22 08:20:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:35,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462088907] [2020-12-22 08:20:35,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:35,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:35,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968180807] [2020-12-22 08:20:35,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:20:35,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:35,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:20:35,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:35,663 INFO L87 Difference]: Start difference. First operand 4892 states and 7194 transitions. Second operand 5 states. [2020-12-22 08:20:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:36,521 INFO L93 Difference]: Finished difference Result 12800 states and 18840 transitions. [2020-12-22 08:20:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:36,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:20:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:36,572 INFO L225 Difference]: With dead ends: 12800 [2020-12-22 08:20:36,573 INFO L226 Difference]: Without dead ends: 10260 [2020-12-22 08:20:36,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:20:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2020-12-22 08:20:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 5906. [2020-12-22 08:20:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5906 states. [2020-12-22 08:20:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5906 states to 5906 states and 8702 transitions. [2020-12-22 08:20:37,147 INFO L78 Accepts]: Start accepts. Automaton has 5906 states and 8702 transitions. Word has length 54 [2020-12-22 08:20:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:37,147 INFO L481 AbstractCegarLoop]: Abstraction has 5906 states and 8702 transitions. [2020-12-22 08:20:37,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:20:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5906 states and 8702 transitions. [2020-12-22 08:20:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:20:37,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:37,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:37,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:20:37,151 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1161753004, now seen corresponding path program 1 times [2020-12-22 08:20:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:37,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998378427] [2020-12-22 08:20:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998378427] [2020-12-22 08:20:37,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:37,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:20:37,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233364205] [2020-12-22 08:20:37,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:20:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:20:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:20:37,267 INFO L87 Difference]: Start difference. First operand 5906 states and 8702 transitions. Second operand 6 states. [2020-12-22 08:20:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:38,665 INFO L93 Difference]: Finished difference Result 18736 states and 27576 transitions. [2020-12-22 08:20:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:20:38,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-12-22 08:20:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:38,699 INFO L225 Difference]: With dead ends: 18736 [2020-12-22 08:20:38,700 INFO L226 Difference]: Without dead ends: 12875 [2020-12-22 08:20:38,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:20:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2020-12-22 08:20:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12785. [2020-12-22 08:20:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12785 states. [2020-12-22 08:20:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12785 states to 12785 states and 18729 transitions. [2020-12-22 08:20:39,862 INFO L78 Accepts]: Start accepts. Automaton has 12785 states and 18729 transitions. Word has length 58 [2020-12-22 08:20:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:39,862 INFO L481 AbstractCegarLoop]: Abstraction has 12785 states and 18729 transitions. [2020-12-22 08:20:39,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:20:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 12785 states and 18729 transitions. [2020-12-22 08:20:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:20:39,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:39,868 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] [2020-12-22 08:20:39,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:20:39,868 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash 536362735, now seen corresponding path program 1 times [2020-12-22 08:20:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:39,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028612585] [2020-12-22 08:20:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:40,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028612585] [2020-12-22 08:20:40,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:40,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:20:40,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760535426] [2020-12-22 08:20:40,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:20:40,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:40,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:20:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:40,059 INFO L87 Difference]: Start difference. First operand 12785 states and 18729 transitions. Second operand 7 states. [2020-12-22 08:20:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:43,548 INFO L93 Difference]: Finished difference Result 48165 states and 69991 transitions. [2020-12-22 08:20:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:20:43,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:20:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:43,660 INFO L225 Difference]: With dead ends: 48165 [2020-12-22 08:20:43,660 INFO L226 Difference]: Without dead ends: 42549 [2020-12-22 08:20:43,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:20:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42549 states. [2020-12-22 08:20:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42549 to 12805. [2020-12-22 08:20:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12805 states. [2020-12-22 08:20:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12805 states to 12805 states and 18753 transitions. [2020-12-22 08:20:45,359 INFO L78 Accepts]: Start accepts. Automaton has 12805 states and 18753 transitions. Word has length 59 [2020-12-22 08:20:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:45,359 INFO L481 AbstractCegarLoop]: Abstraction has 12805 states and 18753 transitions. [2020-12-22 08:20:45,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:20:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 12805 states and 18753 transitions. [2020-12-22 08:20:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:20:45,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:45,365 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] [2020-12-22 08:20:45,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:20:45,365 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash -426804272, now seen corresponding path program 1 times [2020-12-22 08:20:45,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:45,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270113942] [2020-12-22 08:20:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270113942] [2020-12-22 08:20:45,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:45,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:20:45,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388357232] [2020-12-22 08:20:45,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:20:45,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:45,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:20:45,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:45,459 INFO L87 Difference]: Start difference. First operand 12805 states and 18753 transitions. Second operand 7 states. [2020-12-22 08:20:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:50,034 INFO L93 Difference]: Finished difference Result 56408 states and 81759 transitions. [2020-12-22 08:20:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:20:50,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:20:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:50,132 INFO L225 Difference]: With dead ends: 56408 [2020-12-22 08:20:50,132 INFO L226 Difference]: Without dead ends: 50908 [2020-12-22 08:20:50,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:20:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50908 states. [2020-12-22 08:20:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50908 to 12899. [2020-12-22 08:20:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12899 states. [2020-12-22 08:20:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12899 states to 12899 states and 18874 transitions. [2020-12-22 08:20:52,074 INFO L78 Accepts]: Start accepts. Automaton has 12899 states and 18874 transitions. Word has length 59 [2020-12-22 08:20:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:52,075 INFO L481 AbstractCegarLoop]: Abstraction has 12899 states and 18874 transitions. [2020-12-22 08:20:52,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:20:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 12899 states and 18874 transitions. [2020-12-22 08:20:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:20:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:52,081 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] [2020-12-22 08:20:52,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:20:52,082 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -974429839, now seen corresponding path program 1 times [2020-12-22 08:20:52,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:52,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427002519] [2020-12-22 08:20:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:52,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427002519] [2020-12-22 08:20:52,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:52,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:20:52,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315606194] [2020-12-22 08:20:52,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:20:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:20:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:20:52,182 INFO L87 Difference]: Start difference. First operand 12899 states and 18874 transitions. Second operand 7 states. [2020-12-22 08:20:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:59,924 INFO L93 Difference]: Finished difference Result 73039 states and 106176 transitions. [2020-12-22 08:20:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:20:59,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:20:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:00,034 INFO L225 Difference]: With dead ends: 73039 [2020-12-22 08:21:00,035 INFO L226 Difference]: Without dead ends: 66589 [2020-12-22 08:21:00,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:21:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66589 states. [2020-12-22 08:21:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66589 to 12955. [2020-12-22 08:21:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12955 states. [2020-12-22 08:21:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12955 states to 12955 states and 18943 transitions. [2020-12-22 08:21:01,923 INFO L78 Accepts]: Start accepts. Automaton has 12955 states and 18943 transitions. Word has length 59 [2020-12-22 08:21:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:01,924 INFO L481 AbstractCegarLoop]: Abstraction has 12955 states and 18943 transitions. [2020-12-22 08:21:01,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:21:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 12955 states and 18943 transitions. [2020-12-22 08:21:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:21:01,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:01,929 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] [2020-12-22 08:21:01,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:21:01,930 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1695106365, now seen corresponding path program 1 times [2020-12-22 08:21:01,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:01,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379747826] [2020-12-22 08:21:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:02,146 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 08:21:02,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379747826] [2020-12-22 08:21:02,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:02,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:21:02,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716205017] [2020-12-22 08:21:02,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:21:02,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:21:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:21:02,148 INFO L87 Difference]: Start difference. First operand 12955 states and 18943 transitions. Second operand 10 states. [2020-12-22 08:21:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:07,787 INFO L93 Difference]: Finished difference Result 43797 states and 63779 transitions. [2020-12-22 08:21:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:21:07,787 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:21:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:07,829 INFO L225 Difference]: With dead ends: 43797 [2020-12-22 08:21:07,829 INFO L226 Difference]: Without dead ends: 32446 [2020-12-22 08:21:07,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:21:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32446 states. [2020-12-22 08:21:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32446 to 12787. [2020-12-22 08:21:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12787 states. [2020-12-22 08:21:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12787 states to 12787 states and 18678 transitions. [2020-12-22 08:21:09,744 INFO L78 Accepts]: Start accepts. Automaton has 12787 states and 18678 transitions. Word has length 61 [2020-12-22 08:21:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:09,744 INFO L481 AbstractCegarLoop]: Abstraction has 12787 states and 18678 transitions. [2020-12-22 08:21:09,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:21:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 12787 states and 18678 transitions. [2020-12-22 08:21:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:21:09,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:09,749 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] [2020-12-22 08:21:09,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:21:09,749 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1748259780, now seen corresponding path program 1 times [2020-12-22 08:21:09,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:09,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252029490] [2020-12-22 08:21:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:09,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252029490] [2020-12-22 08:21:09,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:09,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:21:09,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4980938] [2020-12-22 08:21:09,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:21:09,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:09,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:21:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:21:09,933 INFO L87 Difference]: Start difference. First operand 12787 states and 18678 transitions. Second operand 10 states. [2020-12-22 08:21:10,612 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2020-12-22 08:21:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:20,554 INFO L93 Difference]: Finished difference Result 71279 states and 103333 transitions. [2020-12-22 08:21:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:21:20,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:21:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:20,633 INFO L225 Difference]: With dead ends: 71279 [2020-12-22 08:21:20,633 INFO L226 Difference]: Without dead ends: 59883 [2020-12-22 08:21:20,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:21:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59883 states. [2020-12-22 08:21:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59883 to 12615. [2020-12-22 08:21:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12615 states. [2020-12-22 08:21:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12615 states to 12615 states and 18415 transitions. [2020-12-22 08:21:22,905 INFO L78 Accepts]: Start accepts. Automaton has 12615 states and 18415 transitions. Word has length 61 [2020-12-22 08:21:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:22,905 INFO L481 AbstractCegarLoop]: Abstraction has 12615 states and 18415 transitions. [2020-12-22 08:21:22,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:21:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 12615 states and 18415 transitions. [2020-12-22 08:21:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:21:22,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:22,910 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] [2020-12-22 08:21:22,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:21:22,910 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash 11490693, now seen corresponding path program 1 times [2020-12-22 08:21:22,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:22,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200971952] [2020-12-22 08:21:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:23,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200971952] [2020-12-22 08:21:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:23,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:21:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085712018] [2020-12-22 08:21:23,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:21:23,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:21:23,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:21:23,279 INFO L87 Difference]: Start difference. First operand 12615 states and 18415 transitions. Second operand 10 states. [2020-12-22 08:21:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:30,235 INFO L93 Difference]: Finished difference Result 43582 states and 63403 transitions. [2020-12-22 08:21:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:21:30,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:21:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:30,271 INFO L225 Difference]: With dead ends: 43582 [2020-12-22 08:21:30,271 INFO L226 Difference]: Without dead ends: 32050 [2020-12-22 08:21:30,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-12-22 08:21:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32050 states. [2020-12-22 08:21:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32050 to 12410. [2020-12-22 08:21:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12410 states. [2020-12-22 08:21:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12410 states to 12410 states and 18130 transitions. [2020-12-22 08:21:32,404 INFO L78 Accepts]: Start accepts. Automaton has 12410 states and 18130 transitions. Word has length 61 [2020-12-22 08:21:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:32,404 INFO L481 AbstractCegarLoop]: Abstraction has 12410 states and 18130 transitions. [2020-12-22 08:21:32,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:21:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 12410 states and 18130 transitions. [2020-12-22 08:21:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:21:32,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:32,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:32,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:21:32,409 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -746765663, now seen corresponding path program 1 times [2020-12-22 08:21:32,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:32,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554325900] [2020-12-22 08:21:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:32,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554325900] [2020-12-22 08:21:32,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:32,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096218169] [2020-12-22 08:21:32,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:32,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:32,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:32,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:32,456 INFO L87 Difference]: Start difference. First operand 12410 states and 18130 transitions. Second operand 3 states. [2020-12-22 08:21:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:34,452 INFO L93 Difference]: Finished difference Result 18839 states and 27478 transitions. [2020-12-22 08:21:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:34,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:21:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:34,467 INFO L225 Difference]: With dead ends: 18839 [2020-12-22 08:21:34,467 INFO L226 Difference]: Without dead ends: 12293 [2020-12-22 08:21:34,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12293 states. [2020-12-22 08:21:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12293 to 12291. [2020-12-22 08:21:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12291 states. [2020-12-22 08:21:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 17688 transitions. [2020-12-22 08:21:36,316 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 17688 transitions. Word has length 62 [2020-12-22 08:21:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:36,317 INFO L481 AbstractCegarLoop]: Abstraction has 12291 states and 17688 transitions. [2020-12-22 08:21:36,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 17688 transitions. [2020-12-22 08:21:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:21:36,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:36,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:36,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:21:36,321 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -691619625, now seen corresponding path program 1 times [2020-12-22 08:21:36,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:36,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581594407] [2020-12-22 08:21:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:36,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581594407] [2020-12-22 08:21:36,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:36,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940787459] [2020-12-22 08:21:36,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:36,366 INFO L87 Difference]: Start difference. First operand 12291 states and 17688 transitions. Second operand 3 states. [2020-12-22 08:21:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:38,474 INFO L93 Difference]: Finished difference Result 16047 states and 23040 transitions. [2020-12-22 08:21:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:38,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:21:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:38,486 INFO L225 Difference]: With dead ends: 16047 [2020-12-22 08:21:38,486 INFO L226 Difference]: Without dead ends: 10654 [2020-12-22 08:21:38,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10654 states. [2020-12-22 08:21:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10654 to 10652. [2020-12-22 08:21:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10652 states. [2020-12-22 08:21:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10652 states to 10652 states and 15057 transitions. [2020-12-22 08:21:40,063 INFO L78 Accepts]: Start accepts. Automaton has 10652 states and 15057 transitions. Word has length 62 [2020-12-22 08:21:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:40,064 INFO L481 AbstractCegarLoop]: Abstraction has 10652 states and 15057 transitions. [2020-12-22 08:21:40,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10652 states and 15057 transitions. [2020-12-22 08:21:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:21:40,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:40,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:40,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:21:40,068 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1051063940, now seen corresponding path program 1 times [2020-12-22 08:21:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:40,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529913530] [2020-12-22 08:21:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529913530] [2020-12-22 08:21:40,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:40,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035695746] [2020-12-22 08:21:40,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:40,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:40,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:40,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:40,121 INFO L87 Difference]: Start difference. First operand 10652 states and 15057 transitions. Second operand 3 states. [2020-12-22 08:21:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:41,933 INFO L93 Difference]: Finished difference Result 13709 states and 19346 transitions. [2020-12-22 08:21:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:41,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:21:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:41,945 INFO L225 Difference]: With dead ends: 13709 [2020-12-22 08:21:41,945 INFO L226 Difference]: Without dead ends: 8952 [2020-12-22 08:21:41,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8952 states. [2020-12-22 08:21:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8952 to 8950. [2020-12-22 08:21:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8950 states. [2020-12-22 08:21:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 12448 transitions. [2020-12-22 08:21:43,359 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 12448 transitions. Word has length 62 [2020-12-22 08:21:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:43,359 INFO L481 AbstractCegarLoop]: Abstraction has 8950 states and 12448 transitions. [2020-12-22 08:21:43,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 12448 transitions. [2020-12-22 08:21:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:21:43,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:43,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:43,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:21:43,362 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash -751537894, now seen corresponding path program 1 times [2020-12-22 08:21:43,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:43,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702512] [2020-12-22 08:21:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:43,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702512] [2020-12-22 08:21:43,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:43,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:21:43,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939217511] [2020-12-22 08:21:43,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:21:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:21:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:43,407 INFO L87 Difference]: Start difference. First operand 8950 states and 12448 transitions. Second operand 3 states. [2020-12-22 08:21:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:45,698 INFO L93 Difference]: Finished difference Result 16326 states and 22801 transitions. [2020-12-22 08:21:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:21:45,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:21:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:45,715 INFO L225 Difference]: With dead ends: 16326 [2020-12-22 08:21:45,715 INFO L226 Difference]: Without dead ends: 12969 [2020-12-22 08:21:45,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:21:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12969 states. [2020-12-22 08:21:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12969 to 8845. [2020-12-22 08:21:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8845 states. [2020-12-22 08:21:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 12288 transitions. [2020-12-22 08:21:47,290 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 12288 transitions. Word has length 63 [2020-12-22 08:21:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:21:47,290 INFO L481 AbstractCegarLoop]: Abstraction has 8845 states and 12288 transitions. [2020-12-22 08:21:47,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:21:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 12288 transitions. [2020-12-22 08:21:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:21:47,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:21:47,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:21:47,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:21:47,292 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:21:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:21:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash 296287221, now seen corresponding path program 1 times [2020-12-22 08:21:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:21:47,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623333169] [2020-12-22 08:21:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:21:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:21:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:21:48,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623333169] [2020-12-22 08:21:48,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:21:48,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:21:48,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143664193] [2020-12-22 08:21:48,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:21:48,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:21:48,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:21:48,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:21:48,279 INFO L87 Difference]: Start difference. First operand 8845 states and 12288 transitions. Second operand 23 states. [2020-12-22 08:21:48,570 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-22 08:21:49,622 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 08:21:49,994 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-12-22 08:21:50,270 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-12-22 08:21:50,796 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2020-12-22 08:21:51,157 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2020-12-22 08:21:51,345 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:21:51,596 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 08:22:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:03,591 INFO L93 Difference]: Finished difference Result 30303 states and 42519 transitions. [2020-12-22 08:22:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:22:03,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:22:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:03,626 INFO L225 Difference]: With dead ends: 30303 [2020-12-22 08:22:03,626 INFO L226 Difference]: Without dead ends: 29922 [2020-12-22 08:22:03,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=458, Invalid=2194, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 08:22:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29922 states. [2020-12-22 08:22:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29922 to 8857. [2020-12-22 08:22:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8857 states. [2020-12-22 08:22:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8857 states to 8857 states and 12303 transitions. [2020-12-22 08:22:05,383 INFO L78 Accepts]: Start accepts. Automaton has 8857 states and 12303 transitions. Word has length 63 [2020-12-22 08:22:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:05,383 INFO L481 AbstractCegarLoop]: Abstraction has 8857 states and 12303 transitions. [2020-12-22 08:22:05,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:22:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states and 12303 transitions. [2020-12-22 08:22:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:22:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:05,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:05,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:22:05,386 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash -678356547, now seen corresponding path program 1 times [2020-12-22 08:22:05,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:05,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430280282] [2020-12-22 08:22:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:06,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430280282] [2020-12-22 08:22:06,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:22:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721522288] [2020-12-22 08:22:06,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:22:06,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:22:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:22:06,432 INFO L87 Difference]: Start difference. First operand 8857 states and 12303 transitions. Second operand 23 states. [2020-12-22 08:22:06,795 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-22 08:22:07,808 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:22:08,010 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:22:08,447 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:22:08,771 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-12-22 08:22:09,374 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-12-22 08:22:09,813 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-12-22 08:22:10,036 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:22:10,347 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 08:22:10,782 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:22:11,091 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:22:11,357 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:22:11,706 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:22:12,098 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 08:22:12,402 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-22 08:22:15,361 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-12-22 08:22:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:24,923 INFO L93 Difference]: Finished difference Result 38366 states and 53938 transitions. [2020-12-22 08:22:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:22:24,925 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:22:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:24,965 INFO L225 Difference]: With dead ends: 38366 [2020-12-22 08:22:24,965 INFO L226 Difference]: Without dead ends: 37985 [2020-12-22 08:22:24,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=476, Invalid=1974, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 08:22:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37985 states. [2020-12-22 08:22:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37985 to 8839. [2020-12-22 08:22:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8839 states. [2020-12-22 08:22:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 12277 transitions. [2020-12-22 08:22:26,928 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 12277 transitions. Word has length 63 [2020-12-22 08:22:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:26,928 INFO L481 AbstractCegarLoop]: Abstraction has 8839 states and 12277 transitions. [2020-12-22 08:22:26,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:22:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 12277 transitions. [2020-12-22 08:22:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:22:26,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:26,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:26,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:22:26,932 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:26,932 INFO L82 PathProgramCache]: Analyzing trace with hash 639398585, now seen corresponding path program 1 times [2020-12-22 08:22:26,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:26,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761762782] [2020-12-22 08:22:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:28,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761762782] [2020-12-22 08:22:28,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:28,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:22:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668193648] [2020-12-22 08:22:28,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:22:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:22:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:22:28,022 INFO L87 Difference]: Start difference. First operand 8839 states and 12277 transitions. Second operand 23 states. [2020-12-22 08:22:28,330 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-12-22 08:22:29,155 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 08:22:29,608 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 08:22:29,900 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-12-22 08:22:30,466 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-12-22 08:22:30,827 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-12-22 08:22:31,025 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:22:31,322 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:22:31,785 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:22:32,071 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-22 08:22:32,337 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:22:33,558 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:22:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:45,051 INFO L93 Difference]: Finished difference Result 24762 states and 34733 transitions. [2020-12-22 08:22:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:22:45,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:22:45,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:45,077 INFO L225 Difference]: With dead ends: 24762 [2020-12-22 08:22:45,077 INFO L226 Difference]: Without dead ends: 24381 [2020-12-22 08:22:45,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:22:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24381 states. [2020-12-22 08:22:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24381 to 8821. [2020-12-22 08:22:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8821 states. [2020-12-22 08:22:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 12251 transitions. [2020-12-22 08:22:47,215 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 12251 transitions. Word has length 63 [2020-12-22 08:22:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:47,215 INFO L481 AbstractCegarLoop]: Abstraction has 8821 states and 12251 transitions. [2020-12-22 08:22:47,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:22:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 12251 transitions. [2020-12-22 08:22:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:22:47,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:47,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:47,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:22:47,218 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash -422382988, now seen corresponding path program 1 times [2020-12-22 08:22:47,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:47,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563449073] [2020-12-22 08:22:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:47,247 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 08:22:47,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563449073] [2020-12-22 08:22:47,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:47,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:47,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097494672] [2020-12-22 08:22:47,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:47,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:47,249 INFO L87 Difference]: Start difference. First operand 8821 states and 12251 transitions. Second operand 3 states. [2020-12-22 08:22:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:50,213 INFO L93 Difference]: Finished difference Result 16084 states and 22442 transitions. [2020-12-22 08:22:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:50,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:22:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:50,230 INFO L225 Difference]: With dead ends: 16084 [2020-12-22 08:22:50,230 INFO L226 Difference]: Without dead ends: 12764 [2020-12-22 08:22:50,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12764 states. [2020-12-22 08:22:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12764 to 8640. [2020-12-22 08:22:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8640 states. [2020-12-22 08:22:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8640 states to 8640 states and 11991 transitions. [2020-12-22 08:22:52,414 INFO L78 Accepts]: Start accepts. Automaton has 8640 states and 11991 transitions. Word has length 63 [2020-12-22 08:22:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:52,414 INFO L481 AbstractCegarLoop]: Abstraction has 8640 states and 11991 transitions. [2020-12-22 08:22:52,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8640 states and 11991 transitions. [2020-12-22 08:22:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:22:52,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:52,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:52,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:22:52,416 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 393964366, now seen corresponding path program 1 times [2020-12-22 08:22:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:52,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326985376] [2020-12-22 08:22:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:52,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326985376] [2020-12-22 08:22:52,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:52,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:22:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658339397] [2020-12-22 08:22:52,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:22:52,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:22:52,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:52,446 INFO L87 Difference]: Start difference. First operand 8640 states and 11991 transitions. Second operand 3 states. [2020-12-22 08:22:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:22:55,684 INFO L93 Difference]: Finished difference Result 16525 states and 23015 transitions. [2020-12-22 08:22:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:22:55,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:22:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:22:55,699 INFO L225 Difference]: With dead ends: 16525 [2020-12-22 08:22:55,700 INFO L226 Difference]: Without dead ends: 12516 [2020-12-22 08:22:55,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:22:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12516 states. [2020-12-22 08:22:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12516 to 8245. [2020-12-22 08:22:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8245 states. [2020-12-22 08:22:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8245 states to 8245 states and 11439 transitions. [2020-12-22 08:22:57,702 INFO L78 Accepts]: Start accepts. Automaton has 8245 states and 11439 transitions. Word has length 63 [2020-12-22 08:22:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:22:57,702 INFO L481 AbstractCegarLoop]: Abstraction has 8245 states and 11439 transitions. [2020-12-22 08:22:57,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:22:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 8245 states and 11439 transitions. [2020-12-22 08:22:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:22:57,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:22:57,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:22:57,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:22:57,704 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:22:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:22:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1222962444, now seen corresponding path program 1 times [2020-12-22 08:22:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:22:57,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636664834] [2020-12-22 08:22:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:22:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:22:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:22:58,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636664834] [2020-12-22 08:22:58,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:22:58,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:22:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511711378] [2020-12-22 08:22:58,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:22:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:22:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:22:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:22:58,218 INFO L87 Difference]: Start difference. First operand 8245 states and 11439 transitions. Second operand 12 states. [2020-12-22 08:22:58,689 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 08:22:58,910 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 08:22:59,149 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 08:22:59,402 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 08:22:59,620 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:22:59,831 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:22:59,976 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 08:23:00,185 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-12-22 08:23:00,460 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 08:23:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:06,683 INFO L93 Difference]: Finished difference Result 21533 states and 30060 transitions. [2020-12-22 08:23:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:23:06,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-12-22 08:23:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:06,703 INFO L225 Difference]: With dead ends: 21533 [2020-12-22 08:23:06,703 INFO L226 Difference]: Without dead ends: 19909 [2020-12-22 08:23:06,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:23:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19909 states. [2020-12-22 08:23:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19909 to 8178. [2020-12-22 08:23:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8178 states. [2020-12-22 08:23:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8178 states to 8178 states and 11345 transitions. [2020-12-22 08:23:09,046 INFO L78 Accepts]: Start accepts. Automaton has 8178 states and 11345 transitions. Word has length 64 [2020-12-22 08:23:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:09,046 INFO L481 AbstractCegarLoop]: Abstraction has 8178 states and 11345 transitions. [2020-12-22 08:23:09,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:23:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8178 states and 11345 transitions. [2020-12-22 08:23:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:23:09,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:09,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:09,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:23:09,048 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1280220746, now seen corresponding path program 1 times [2020-12-22 08:23:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330699651] [2020-12-22 08:23:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330699651] [2020-12-22 08:23:10,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:10,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:23:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858100120] [2020-12-22 08:23:10,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:23:10,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:23:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:23:10,193 INFO L87 Difference]: Start difference. First operand 8178 states and 11345 transitions. Second operand 18 states. [2020-12-22 08:23:10,441 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:23:10,731 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:23:10,913 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-22 08:23:11,151 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-12-22 08:23:11,450 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:23:11,858 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 08:23:12,218 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-12-22 08:23:12,862 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2020-12-22 08:23:13,486 WARN L197 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-12-22 08:23:13,888 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-22 08:23:14,078 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:23:14,484 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-22 08:23:14,824 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:23:15,342 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-22 08:23:15,612 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:23:16,050 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-12-22 08:23:16,567 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:23:16,961 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-22 08:23:17,233 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 08:23:17,412 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 08:23:17,552 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-22 08:23:17,884 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:23:18,236 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:23:18,623 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 08:23:19,126 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 08:23:19,649 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 08:23:20,909 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:23:22,241 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:23:28,935 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 08:23:30,641 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:23:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:35,391 INFO L93 Difference]: Finished difference Result 37689 states and 52858 transitions. [2020-12-22 08:23:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 08:23:35,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-12-22 08:23:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:35,432 INFO L225 Difference]: With dead ends: 37689 [2020-12-22 08:23:35,432 INFO L226 Difference]: Without dead ends: 37080 [2020-12-22 08:23:35,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=581, Invalid=1969, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 08:23:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37080 states. [2020-12-22 08:23:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37080 to 8118. [2020-12-22 08:23:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8118 states. [2020-12-22 08:23:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 11263 transitions. [2020-12-22 08:23:38,205 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 11263 transitions. Word has length 64 [2020-12-22 08:23:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:38,205 INFO L481 AbstractCegarLoop]: Abstraction has 8118 states and 11263 transitions. [2020-12-22 08:23:38,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:23:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 11263 transitions. [2020-12-22 08:23:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:23:38,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:38,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:38,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:23:38,209 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash 880460014, now seen corresponding path program 1 times [2020-12-22 08:23:38,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:38,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662390969] [2020-12-22 08:23:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:38,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662390969] [2020-12-22 08:23:38,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:38,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:23:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501284304] [2020-12-22 08:23:38,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:23:38,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:23:38,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:38,284 INFO L87 Difference]: Start difference. First operand 8118 states and 11263 transitions. Second operand 5 states. [2020-12-22 08:23:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:40,673 INFO L93 Difference]: Finished difference Result 8124 states and 11266 transitions. [2020-12-22 08:23:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:23:40,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:23:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:40,683 INFO L225 Difference]: With dead ends: 8124 [2020-12-22 08:23:40,684 INFO L226 Difference]: Without dead ends: 7310 [2020-12-22 08:23:40,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:23:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7310 states. [2020-12-22 08:23:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7310 to 7306. [2020-12-22 08:23:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7306 states. [2020-12-22 08:23:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 10152 transitions. [2020-12-22 08:23:43,019 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 10152 transitions. Word has length 67 [2020-12-22 08:23:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:43,019 INFO L481 AbstractCegarLoop]: Abstraction has 7306 states and 10152 transitions. [2020-12-22 08:23:43,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:23:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 10152 transitions. [2020-12-22 08:23:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:23:43,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:43,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:43,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:23:43,022 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1617522588, now seen corresponding path program 1 times [2020-12-22 08:23:43,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:43,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394015480] [2020-12-22 08:23:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394015480] [2020-12-22 08:23:43,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:43,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582252062] [2020-12-22 08:23:43,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:43,067 INFO L87 Difference]: Start difference. First operand 7306 states and 10152 transitions. Second operand 3 states. [2020-12-22 08:23:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:47,537 INFO L93 Difference]: Finished difference Result 19983 states and 27844 transitions. [2020-12-22 08:23:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:47,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:23:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:47,553 INFO L225 Difference]: With dead ends: 19983 [2020-12-22 08:23:47,553 INFO L226 Difference]: Without dead ends: 13320 [2020-12-22 08:23:47,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13320 states. [2020-12-22 08:23:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13320 to 12463. [2020-12-22 08:23:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12463 states. [2020-12-22 08:23:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 17302 transitions. [2020-12-22 08:23:51,614 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 17302 transitions. Word has length 70 [2020-12-22 08:23:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:23:51,614 INFO L481 AbstractCegarLoop]: Abstraction has 12463 states and 17302 transitions. [2020-12-22 08:23:51,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:23:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 17302 transitions. [2020-12-22 08:23:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:23:51,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:23:51,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:23:51,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:23:51,617 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:23:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:23:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash 121806462, now seen corresponding path program 1 times [2020-12-22 08:23:51,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:23:51,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135415863] [2020-12-22 08:23:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:23:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:23:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:23:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135415863] [2020-12-22 08:23:51,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:23:51,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:23:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166286957] [2020-12-22 08:23:51,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:23:51,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:23:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:23:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:51,660 INFO L87 Difference]: Start difference. First operand 12463 states and 17302 transitions. Second operand 3 states. [2020-12-22 08:23:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:23:59,910 INFO L93 Difference]: Finished difference Result 34805 states and 48276 transitions. [2020-12-22 08:23:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:23:59,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-22 08:23:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:23:59,935 INFO L225 Difference]: With dead ends: 34805 [2020-12-22 08:23:59,935 INFO L226 Difference]: Without dead ends: 22985 [2020-12-22 08:23:59,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:23:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22985 states. [2020-12-22 08:24:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22985 to 21273. [2020-12-22 08:24:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21273 states. [2020-12-22 08:24:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21273 states to 21273 states and 29398 transitions. [2020-12-22 08:24:07,071 INFO L78 Accepts]: Start accepts. Automaton has 21273 states and 29398 transitions. Word has length 71 [2020-12-22 08:24:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:07,071 INFO L481 AbstractCegarLoop]: Abstraction has 21273 states and 29398 transitions. [2020-12-22 08:24:07,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 21273 states and 29398 transitions. [2020-12-22 08:24:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:24:07,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:07,073 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] [2020-12-22 08:24:07,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:24:07,073 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:07,074 INFO L82 PathProgramCache]: Analyzing trace with hash -577663364, now seen corresponding path program 1 times [2020-12-22 08:24:07,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:07,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910383983] [2020-12-22 08:24:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:07,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910383983] [2020-12-22 08:24:07,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:07,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:24:07,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35092879] [2020-12-22 08:24:07,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:24:07,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:24:07,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:07,119 INFO L87 Difference]: Start difference. First operand 21273 states and 29398 transitions. Second operand 3 states. [2020-12-22 08:24:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:24:20,479 INFO L93 Difference]: Finished difference Result 58777 states and 80844 transitions. [2020-12-22 08:24:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:24:20,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:24:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:24:20,521 INFO L225 Difference]: With dead ends: 58777 [2020-12-22 08:24:20,521 INFO L226 Difference]: Without dead ends: 38006 [2020-12-22 08:24:20,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:24:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38006 states. [2020-12-22 08:24:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38006 to 34492. [2020-12-22 08:24:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34492 states. [2020-12-22 08:24:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34492 states to 34492 states and 47112 transitions. [2020-12-22 08:24:33,047 INFO L78 Accepts]: Start accepts. Automaton has 34492 states and 47112 transitions. Word has length 73 [2020-12-22 08:24:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:24:33,048 INFO L481 AbstractCegarLoop]: Abstraction has 34492 states and 47112 transitions. [2020-12-22 08:24:33,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:24:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 34492 states and 47112 transitions. [2020-12-22 08:24:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:24:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:24:33,049 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] [2020-12-22 08:24:33,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 08:24:33,050 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:24:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:24:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -686006937, now seen corresponding path program 1 times [2020-12-22 08:24:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:24:33,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444357472] [2020-12-22 08:24:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:24:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:24:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:24:33,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444357472] [2020-12-22 08:24:33,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:24:33,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:24:33,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231738073] [2020-12-22 08:24:33,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:24:33,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:24:33,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:24:33,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:24:33,143 INFO L87 Difference]: Start difference. First operand 34492 states and 47112 transitions. Second operand 6 states.