/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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:36:35,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:36:35,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:36:35,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:36:35,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:36:35,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:36:35,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:36:35,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:36:35,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:36:35,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:36:35,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:36:35,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:36:35,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:36:35,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:36:35,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:36:35,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:36:35,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:36:35,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:36:35,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:36:35,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:36:35,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:36:35,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:36:35,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:36:35,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:36:35,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:36:35,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:36:35,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:36:35,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:36:35,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:36:35,947 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:36:35,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:36:35,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:36:35,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:36:35,953 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:36:35,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:36:35,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:36:35,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:36:35,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:36:35,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:36:35,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:36:35,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:36:35,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:36:35,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:36:35,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:36:35,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:36:35,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:36:35,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:36:35,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:36:35,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:36:35,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:36:35,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:36:35,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:36:35,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:36:35,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:36:35,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:36:36,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:36:36,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:36:36,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:36:36,419 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:36:36,420 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:36:36,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:36:36,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d755b736/afeeceab4c86413595145fa1799f14c7/FLAG3ce1545a8 [2020-12-22 08:36:37,146 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:36:37,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:36:37,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d755b736/afeeceab4c86413595145fa1799f14c7/FLAG3ce1545a8 [2020-12-22 08:36:37,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d755b736/afeeceab4c86413595145fa1799f14c7 [2020-12-22 08:36:37,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:36:37,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:36:37,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:36:37,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:36:37,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:36:37,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:36:37" (1/1) ... [2020-12-22 08:36:37,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208e478c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:37, skipping insertion in model container [2020-12-22 08:36:37,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:36:37" (1/1) ... [2020-12-22 08:36:37,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:36:37,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:36:37,867 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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6472,6485] [2020-12-22 08:36:37,913 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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8667,8680] [2020-12-22 08:36:37,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:36:37,963 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:36:38,020 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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6472,6485] [2020-12-22 08:36:38,034 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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8667,8680] [2020-12-22 08:36:38,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:36:38,080 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:36:38,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38 WrapperNode [2020-12-22 08:36:38,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:36:38,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:36:38,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:36:38,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:36:38,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:36:38,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:36:38,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:36:38,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:36:38,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (1/1) ... [2020-12-22 08:36:38,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:36:38,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:36:38,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:36:38,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:36:38,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (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 08:36:38,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:36:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:36:38,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:36:38,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:36:39,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:36:39,575 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:36:39,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:39 BoogieIcfgContainer [2020-12-22 08:36:39,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:36:39,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:36:39,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:36:39,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:36:39,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:36:37" (1/3) ... [2020-12-22 08:36:39,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c935fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:39, skipping insertion in model container [2020-12-22 08:36:39,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:36:38" (2/3) ... [2020-12-22 08:36:39,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c935fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:36:39, skipping insertion in model container [2020-12-22 08:36:39,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:36:39" (3/3) ... [2020-12-22 08:36:39,587 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:36:39,594 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:36:39,600 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 08:36:39,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 08:36:39,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:36:39,650 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:36:39,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:36:39,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:36:39,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:36:39,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:36:39,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:36:39,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:36:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2020-12-22 08:36:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 08:36:39,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:39,678 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] [2020-12-22 08:36:39,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1096512752, now seen corresponding path program 1 times [2020-12-22 08:36:39,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207420988] [2020-12-22 08:36:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:40,071 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 08:36:40,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207420988] [2020-12-22 08:36:40,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:40,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:36:40,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801126021] [2020-12-22 08:36:40,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:36:40,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:40,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:36:40,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:40,096 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2020-12-22 08:36:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:40,207 INFO L93 Difference]: Finished difference Result 206 states and 333 transitions. [2020-12-22 08:36:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:36:40,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-22 08:36:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:40,225 INFO L225 Difference]: With dead ends: 206 [2020-12-22 08:36:40,225 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 08:36:40,229 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 08:36:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 08:36:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-12-22 08:36:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 08:36:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2020-12-22 08:36:40,295 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 47 [2020-12-22 08:36:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:40,296 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2020-12-22 08:36:40,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:36:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2020-12-22 08:36:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:36:40,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:40,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:36:40,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:36:40,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash 191283016, now seen corresponding path program 1 times [2020-12-22 08:36:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:40,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772982856] [2020-12-22 08:36:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:40,532 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 08:36:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772982856] [2020-12-22 08:36:40,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:36:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983308266] [2020-12-22 08:36:40,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:36:40,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:40,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:36:40,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:36:40,537 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand 3 states. [2020-12-22 08:36:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:40,701 INFO L93 Difference]: Finished difference Result 280 states and 410 transitions. [2020-12-22 08:36:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:36:40,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:36:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:40,708 INFO L225 Difference]: With dead ends: 280 [2020-12-22 08:36:40,709 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 08:36:40,713 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 08:36:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 08:36:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2020-12-22 08:36:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 08:36:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 280 transitions. [2020-12-22 08:36:40,779 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 280 transitions. Word has length 48 [2020-12-22 08:36:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:40,780 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 280 transitions. [2020-12-22 08:36:40,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:36:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 280 transitions. [2020-12-22 08:36:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:36:40,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:40,786 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 08:36:40,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:36:40,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1589815569, now seen corresponding path program 1 times [2020-12-22 08:36:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:40,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989968453] [2020-12-22 08:36:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:40,997 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 08:36:40,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989968453] [2020-12-22 08:36:40,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:40,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:40,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462862149] [2020-12-22 08:36:40,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:40,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:41,001 INFO L87 Difference]: Start difference. First operand 195 states and 280 transitions. Second operand 5 states. [2020-12-22 08:36:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:41,155 INFO L93 Difference]: Finished difference Result 602 states and 897 transitions. [2020-12-22 08:36:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:41,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-12-22 08:36:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:41,165 INFO L225 Difference]: With dead ends: 602 [2020-12-22 08:36:41,166 INFO L226 Difference]: Without dead ends: 481 [2020-12-22 08:36:41,169 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 08:36:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-12-22 08:36:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 288. [2020-12-22 08:36:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 08:36:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 423 transitions. [2020-12-22 08:36:41,206 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 423 transitions. Word has length 49 [2020-12-22 08:36:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:41,207 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 423 transitions. [2020-12-22 08:36:41,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 423 transitions. [2020-12-22 08:36:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:36:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:41,209 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] [2020-12-22 08:36:41,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:36:41,210 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 727047131, now seen corresponding path program 1 times [2020-12-22 08:36:41,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:41,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439944296] [2020-12-22 08:36:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:41,308 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 08:36:41,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439944296] [2020-12-22 08:36:41,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:41,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:41,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791820527] [2020-12-22 08:36:41,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:41,314 INFO L87 Difference]: Start difference. First operand 288 states and 423 transitions. Second operand 5 states. [2020-12-22 08:36:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:41,558 INFO L93 Difference]: Finished difference Result 791 states and 1183 transitions. [2020-12-22 08:36:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:41,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-12-22 08:36:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:41,562 INFO L225 Difference]: With dead ends: 791 [2020-12-22 08:36:41,563 INFO L226 Difference]: Without dead ends: 525 [2020-12-22 08:36:41,567 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 08:36:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-12-22 08:36:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 520. [2020-12-22 08:36:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-22 08:36:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 774 transitions. [2020-12-22 08:36:41,658 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 774 transitions. Word has length 49 [2020-12-22 08:36:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:41,658 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 774 transitions. [2020-12-22 08:36:41,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 774 transitions. [2020-12-22 08:36:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:36:41,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:41,668 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] [2020-12-22 08:36:41,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:36:41,669 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash -784609034, now seen corresponding path program 1 times [2020-12-22 08:36:41,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:41,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66912824] [2020-12-22 08:36:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:41,819 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 08:36:41,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66912824] [2020-12-22 08:36:41,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:41,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630276688] [2020-12-22 08:36:41,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:41,824 INFO L87 Difference]: Start difference. First operand 520 states and 774 transitions. Second operand 5 states. [2020-12-22 08:36:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:42,031 INFO L93 Difference]: Finished difference Result 1010 states and 1516 transitions. [2020-12-22 08:36:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:42,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-22 08:36:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:42,036 INFO L225 Difference]: With dead ends: 1010 [2020-12-22 08:36:42,037 INFO L226 Difference]: Without dead ends: 520 [2020-12-22 08:36:42,038 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 08:36:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-12-22 08:36:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2020-12-22 08:36:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-22 08:36:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 763 transitions. [2020-12-22 08:36:42,092 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 763 transitions. Word has length 50 [2020-12-22 08:36:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:42,092 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 763 transitions. [2020-12-22 08:36:42,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 763 transitions. [2020-12-22 08:36:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:36:42,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:42,094 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] [2020-12-22 08:36:42,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:36:42,095 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -535041221, now seen corresponding path program 1 times [2020-12-22 08:36:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:42,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606791220] [2020-12-22 08:36:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:42,192 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 08:36:42,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606791220] [2020-12-22 08:36:42,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:42,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:36:42,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567878941] [2020-12-22 08:36:42,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:42,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:42,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:42,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:42,195 INFO L87 Difference]: Start difference. First operand 520 states and 763 transitions. Second operand 5 states. [2020-12-22 08:36:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:42,359 INFO L93 Difference]: Finished difference Result 1014 states and 1499 transitions. [2020-12-22 08:36:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:42,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:36:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:42,364 INFO L225 Difference]: With dead ends: 1014 [2020-12-22 08:36:42,364 INFO L226 Difference]: Without dead ends: 520 [2020-12-22 08:36:42,366 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 08:36:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-12-22 08:36:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2020-12-22 08:36:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-22 08:36:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 752 transitions. [2020-12-22 08:36:42,411 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 752 transitions. Word has length 51 [2020-12-22 08:36:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:42,411 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-12-22 08:36:42,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 752 transitions. [2020-12-22 08:36:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:36:42,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:42,413 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 08:36:42,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:36:42,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1372292342, now seen corresponding path program 1 times [2020-12-22 08:36:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:42,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748453758] [2020-12-22 08:36:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:42,523 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 08:36:42,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748453758] [2020-12-22 08:36:42,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:42,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118431384] [2020-12-22 08:36:42,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:42,527 INFO L87 Difference]: Start difference. First operand 520 states and 752 transitions. Second operand 5 states. [2020-12-22 08:36:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:42,690 INFO L93 Difference]: Finished difference Result 1289 states and 1885 transitions. [2020-12-22 08:36:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:42,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:36:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:42,697 INFO L225 Difference]: With dead ends: 1289 [2020-12-22 08:36:42,698 INFO L226 Difference]: Without dead ends: 1049 [2020-12-22 08:36:42,699 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 08:36:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2020-12-22 08:36:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 782. [2020-12-22 08:36:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2020-12-22 08:36:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1137 transitions. [2020-12-22 08:36:42,779 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1137 transitions. Word has length 52 [2020-12-22 08:36:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:42,779 INFO L481 AbstractCegarLoop]: Abstraction has 782 states and 1137 transitions. [2020-12-22 08:36:42,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1137 transitions. [2020-12-22 08:36:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:36:42,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:42,781 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 08:36:42,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:36:42,781 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1980798090, now seen corresponding path program 1 times [2020-12-22 08:36:42,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:42,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642338171] [2020-12-22 08:36:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:42,906 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 08:36:42,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642338171] [2020-12-22 08:36:42,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:42,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:36:42,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549280658] [2020-12-22 08:36:42,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:36:42,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:36:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:36:42,909 INFO L87 Difference]: Start difference. First operand 782 states and 1137 transitions. Second operand 5 states. [2020-12-22 08:36:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:43,143 INFO L93 Difference]: Finished difference Result 1499 states and 2197 transitions. [2020-12-22 08:36:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:36:43,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:36:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:43,151 INFO L225 Difference]: With dead ends: 1499 [2020-12-22 08:36:43,151 INFO L226 Difference]: Without dead ends: 1259 [2020-12-22 08:36:43,152 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 08:36:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2020-12-22 08:36:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 957. [2020-12-22 08:36:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-12-22 08:36:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1398 transitions. [2020-12-22 08:36:43,251 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1398 transitions. Word has length 52 [2020-12-22 08:36:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:43,251 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1398 transitions. [2020-12-22 08:36:43,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:36:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1398 transitions. [2020-12-22 08:36:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:36:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:43,252 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 08:36:43,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:36:43,253 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1423750650, now seen corresponding path program 1 times [2020-12-22 08:36:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533780336] [2020-12-22 08:36:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:43,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533780336] [2020-12-22 08:36:43,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:43,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:36:43,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97147302] [2020-12-22 08:36:43,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:36:43,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:36:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:36:43,472 INFO L87 Difference]: Start difference. First operand 957 states and 1398 transitions. Second operand 9 states. [2020-12-22 08:36:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:44,244 INFO L93 Difference]: Finished difference Result 2666 states and 3929 transitions. [2020-12-22 08:36:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:36:44,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-12-22 08:36:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:44,255 INFO L225 Difference]: With dead ends: 2666 [2020-12-22 08:36:44,255 INFO L226 Difference]: Without dead ends: 1810 [2020-12-22 08:36:44,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:36:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2020-12-22 08:36:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 957. [2020-12-22 08:36:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-12-22 08:36:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1397 transitions. [2020-12-22 08:36:44,412 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1397 transitions. Word has length 53 [2020-12-22 08:36:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:44,413 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1397 transitions. [2020-12-22 08:36:44,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:36:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1397 transitions. [2020-12-22 08:36:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:36:44,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:44,414 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 08:36:44,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:36:44,415 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:44,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1451758686, now seen corresponding path program 1 times [2020-12-22 08:36:44,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:44,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840116807] [2020-12-22 08:36:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:44,677 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 08:36:44,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840116807] [2020-12-22 08:36:44,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:44,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:36:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304902899] [2020-12-22 08:36:44,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:36:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:36:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:36:44,680 INFO L87 Difference]: Start difference. First operand 957 states and 1397 transitions. Second operand 10 states. [2020-12-22 08:36:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:45,801 INFO L93 Difference]: Finished difference Result 2490 states and 3650 transitions. [2020-12-22 08:36:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:36:45,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-22 08:36:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:45,813 INFO L225 Difference]: With dead ends: 2490 [2020-12-22 08:36:45,814 INFO L226 Difference]: Without dead ends: 1622 [2020-12-22 08:36:45,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:36:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-12-22 08:36:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 957. [2020-12-22 08:36:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-12-22 08:36:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1394 transitions. [2020-12-22 08:36:45,960 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1394 transitions. Word has length 53 [2020-12-22 08:36:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:45,960 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1394 transitions. [2020-12-22 08:36:45,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:36:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1394 transitions. [2020-12-22 08:36:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:36:45,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:45,961 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 08:36:45,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:36:45,962 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1755644783, now seen corresponding path program 1 times [2020-12-22 08:36:45,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:45,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542686294] [2020-12-22 08:36:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:46,149 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 08:36:46,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542686294] [2020-12-22 08:36:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:46,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:36:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343022190] [2020-12-22 08:36:46,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:36:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:36:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:36:46,153 INFO L87 Difference]: Start difference. First operand 957 states and 1394 transitions. Second operand 10 states. [2020-12-22 08:36:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:47,212 INFO L93 Difference]: Finished difference Result 2718 states and 3978 transitions. [2020-12-22 08:36:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:36:47,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-12-22 08:36:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:47,223 INFO L225 Difference]: With dead ends: 2718 [2020-12-22 08:36:47,224 INFO L226 Difference]: Without dead ends: 1865 [2020-12-22 08:36:47,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:36:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2020-12-22 08:36:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 957. [2020-12-22 08:36:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-12-22 08:36:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1388 transitions. [2020-12-22 08:36:47,398 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1388 transitions. Word has length 54 [2020-12-22 08:36:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:47,398 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1388 transitions. [2020-12-22 08:36:47,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:36:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1388 transitions. [2020-12-22 08:36:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:36:47,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:47,399 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] [2020-12-22 08:36:47,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:36:47,400 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1521991144, now seen corresponding path program 1 times [2020-12-22 08:36:47,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:47,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497310472] [2020-12-22 08:36:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:48,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497310472] [2020-12-22 08:36:48,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:48,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:36:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404370734] [2020-12-22 08:36:48,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:36:48,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:36:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:48,087 INFO L87 Difference]: Start difference. First operand 957 states and 1388 transitions. Second operand 21 states. [2020-12-22 08:36:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:51,900 INFO L93 Difference]: Finished difference Result 4718 states and 6961 transitions. [2020-12-22 08:36:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:36:51,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-12-22 08:36:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:51,922 INFO L225 Difference]: With dead ends: 4718 [2020-12-22 08:36:51,922 INFO L226 Difference]: Without dead ends: 4299 [2020-12-22 08:36:51,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 08:36:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2020-12-22 08:36:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 957. [2020-12-22 08:36:52,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2020-12-22 08:36:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1386 transitions. [2020-12-22 08:36:52,126 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1386 transitions. Word has length 55 [2020-12-22 08:36:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:52,126 INFO L481 AbstractCegarLoop]: Abstraction has 957 states and 1386 transitions. [2020-12-22 08:36:52,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:36:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1386 transitions. [2020-12-22 08:36:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:36:52,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:52,127 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] [2020-12-22 08:36:52,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:36:52,128 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash 822613335, now seen corresponding path program 1 times [2020-12-22 08:36:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575902323] [2020-12-22 08:36:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:52,965 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 08:36:52,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575902323] [2020-12-22 08:36:52,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:52,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:36:52,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139053220] [2020-12-22 08:36:52,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:36:52,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:36:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:36:52,967 INFO L87 Difference]: Start difference. First operand 957 states and 1386 transitions. Second operand 21 states. [2020-12-22 08:36:53,177 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 08:36:53,841 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:36:54,059 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 08:36:54,316 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-22 08:36:54,623 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-12-22 08:36:54,787 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:36:54,951 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:36:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:36:57,758 INFO L93 Difference]: Finished difference Result 4508 states and 6647 transitions. [2020-12-22 08:36:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 08:36:57,759 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-12-22 08:36:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:36:57,777 INFO L225 Difference]: With dead ends: 4508 [2020-12-22 08:36:57,777 INFO L226 Difference]: Without dead ends: 4095 [2020-12-22 08:36:57,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:36:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2020-12-22 08:36:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 962. [2020-12-22 08:36:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-12-22 08:36:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1392 transitions. [2020-12-22 08:36:57,999 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1392 transitions. Word has length 55 [2020-12-22 08:36:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:36:57,999 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1392 transitions. [2020-12-22 08:36:57,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:36:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1392 transitions. [2020-12-22 08:36:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:36:58,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:36:58,000 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] [2020-12-22 08:36:58,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:36:58,001 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:36:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:36:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1171871732, now seen corresponding path program 1 times [2020-12-22 08:36:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:36:58,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144315122] [2020-12-22 08:36:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:36:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:36:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:36:58,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144315122] [2020-12-22 08:36:58,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:36:58,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-12-22 08:36:58,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072769939] [2020-12-22 08:36:58,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 08:36:58,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:36:58,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 08:36:58,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:36:58,843 INFO L87 Difference]: Start difference. First operand 962 states and 1392 transitions. Second operand 22 states. [2020-12-22 08:36:59,138 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-12-22 08:37:00,006 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:37:00,266 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-12-22 08:37:00,536 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-12-22 08:37:00,877 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-12-22 08:37:01,059 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:37:01,242 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:37:01,506 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:37:01,712 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:37:01,979 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:37:02,233 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:37:02,410 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 08:37:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:04,453 INFO L93 Difference]: Finished difference Result 3530 states and 5183 transitions. [2020-12-22 08:37:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:37:04,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-12-22 08:37:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:04,468 INFO L225 Difference]: With dead ends: 3530 [2020-12-22 08:37:04,469 INFO L226 Difference]: Without dead ends: 3281 [2020-12-22 08:37:04,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=411, Invalid=1659, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:37:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2020-12-22 08:37:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 962. [2020-12-22 08:37:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-12-22 08:37:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1391 transitions. [2020-12-22 08:37:04,725 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1391 transitions. Word has length 55 [2020-12-22 08:37:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:04,725 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1391 transitions. [2020-12-22 08:37:04,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 08:37:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1391 transitions. [2020-12-22 08:37:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:37:04,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:04,726 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] [2020-12-22 08:37:04,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:37:04,726 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 380290649, now seen corresponding path program 1 times [2020-12-22 08:37:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:04,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41270863] [2020-12-22 08:37:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:05,450 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 08:37:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41270863] [2020-12-22 08:37:05,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:05,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-12-22 08:37:05,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667228712] [2020-12-22 08:37:05,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:37:05,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:37:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:37:05,452 INFO L87 Difference]: Start difference. First operand 962 states and 1391 transitions. Second operand 21 states. [2020-12-22 08:37:05,650 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-12-22 08:37:06,380 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:37:06,571 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 08:37:06,801 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 08:37:06,956 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:37:07,111 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 08:37:07,343 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:37:07,518 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:37:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:09,683 INFO L93 Difference]: Finished difference Result 3469 states and 5095 transitions. [2020-12-22 08:37:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 08:37:09,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-12-22 08:37:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:09,697 INFO L225 Difference]: With dead ends: 3469 [2020-12-22 08:37:09,698 INFO L226 Difference]: Without dead ends: 3050 [2020-12-22 08:37:09,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:37:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2020-12-22 08:37:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 967. [2020-12-22 08:37:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-12-22 08:37:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1396 transitions. [2020-12-22 08:37:09,920 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1396 transitions. Word has length 55 [2020-12-22 08:37:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:09,920 INFO L481 AbstractCegarLoop]: Abstraction has 967 states and 1396 transitions. [2020-12-22 08:37:09,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 08:37:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1396 transitions. [2020-12-22 08:37:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:09,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:09,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:09,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:37:09,921 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1519790906, now seen corresponding path program 1 times [2020-12-22 08:37:09,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:09,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239601590] [2020-12-22 08:37:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:10,489 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 08:37:10,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239601590] [2020-12-22 08:37:10,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:10,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 08:37:10,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355764768] [2020-12-22 08:37:10,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 08:37:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 08:37:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:37:10,492 INFO L87 Difference]: Start difference. First operand 967 states and 1396 transitions. Second operand 14 states. [2020-12-22 08:37:10,619 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-12-22 08:37:11,061 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-12-22 08:37:11,405 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-22 08:37:11,788 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:37:12,179 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:37:12,735 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-12-22 08:37:13,156 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-12-22 08:37:13,341 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:37:13,905 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 08:37:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:14,413 INFO L93 Difference]: Finished difference Result 2841 states and 4166 transitions. [2020-12-22 08:37:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:37:14,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-12-22 08:37:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:14,421 INFO L225 Difference]: With dead ends: 2841 [2020-12-22 08:37:14,421 INFO L226 Difference]: Without dead ends: 2395 [2020-12-22 08:37:14,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:37:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2020-12-22 08:37:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 934. [2020-12-22 08:37:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2020-12-22 08:37:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1353 transitions. [2020-12-22 08:37:14,650 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1353 transitions. Word has length 56 [2020-12-22 08:37:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:14,650 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 1353 transitions. [2020-12-22 08:37:14,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 08:37:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1353 transitions. [2020-12-22 08:37:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:14,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:14,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:14,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:37:14,652 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1258334466, now seen corresponding path program 1 times [2020-12-22 08:37:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:14,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14284219] [2020-12-22 08:37:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:15,044 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:37:15,468 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 08:37:15,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14284219] [2020-12-22 08:37:15,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:15,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:37:15,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354714978] [2020-12-22 08:37:15,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:37:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:37:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:37:15,470 INFO L87 Difference]: Start difference. First operand 934 states and 1353 transitions. Second operand 17 states. [2020-12-22 08:37:16,029 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-12-22 08:37:16,326 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 08:37:16,647 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 08:37:16,988 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-22 08:37:17,310 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 08:37:17,639 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 08:37:18,001 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-22 08:37:18,348 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 08:37:18,599 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 08:37:18,754 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 08:37:19,259 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 08:37:19,783 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 08:37:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:22,802 INFO L93 Difference]: Finished difference Result 8726 states and 12966 transitions. [2020-12-22 08:37:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:37:22,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-12-22 08:37:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:22,820 INFO L225 Difference]: With dead ends: 8726 [2020-12-22 08:37:22,821 INFO L226 Difference]: Without dead ends: 8307 [2020-12-22 08:37:22,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 08:37:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8307 states. [2020-12-22 08:37:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8307 to 916. [2020-12-22 08:37:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2020-12-22 08:37:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1329 transitions. [2020-12-22 08:37:23,160 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1329 transitions. Word has length 56 [2020-12-22 08:37:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:23,160 INFO L481 AbstractCegarLoop]: Abstraction has 916 states and 1329 transitions. [2020-12-22 08:37:23,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:37:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1329 transitions. [2020-12-22 08:37:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:23,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:23,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:23,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:37:23,162 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1802177434, now seen corresponding path program 1 times [2020-12-22 08:37:23,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:23,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053394569] [2020-12-22 08:37:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:24,306 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 08:37:24,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053394569] [2020-12-22 08:37:24,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:24,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-12-22 08:37:24,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111313725] [2020-12-22 08:37:24,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 08:37:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 08:37:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-12-22 08:37:24,308 INFO L87 Difference]: Start difference. First operand 916 states and 1329 transitions. Second operand 20 states. [2020-12-22 08:37:24,487 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 08:37:25,029 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:37:25,267 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:37:25,489 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:37:25,756 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 08:37:26,152 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-12-22 08:37:26,406 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 08:37:26,669 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 08:37:27,034 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 08:37:27,321 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-12-22 08:37:27,667 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-22 08:37:27,961 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:37:28,148 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 08:37:28,351 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 08:37:28,598 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:37:29,801 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 08:37:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:31,955 INFO L93 Difference]: Finished difference Result 4194 states and 6191 transitions. [2020-12-22 08:37:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 08:37:31,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-12-22 08:37:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:31,962 INFO L225 Difference]: With dead ends: 4194 [2020-12-22 08:37:31,962 INFO L226 Difference]: Without dead ends: 3781 [2020-12-22 08:37:31,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 08:37:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2020-12-22 08:37:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 912. [2020-12-22 08:37:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 912 states. [2020-12-22 08:37:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1324 transitions. [2020-12-22 08:37:32,278 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1324 transitions. Word has length 56 [2020-12-22 08:37:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:32,278 INFO L481 AbstractCegarLoop]: Abstraction has 912 states and 1324 transitions. [2020-12-22 08:37:32,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 08:37:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1324 transitions. [2020-12-22 08:37:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:32,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:32,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:32,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:37:32,279 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1616369829, now seen corresponding path program 1 times [2020-12-22 08:37:32,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:32,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533752662] [2020-12-22 08:37:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:32,689 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 08:37:32,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533752662] [2020-12-22 08:37:32,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:32,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:37:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293814309] [2020-12-22 08:37:32,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:37:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:37:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:37:32,691 INFO L87 Difference]: Start difference. First operand 912 states and 1324 transitions. Second operand 12 states. [2020-12-22 08:37:33,234 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 08:37:33,457 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-12-22 08:37:33,692 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-12-22 08:37:33,907 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:37:34,106 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 08:37:34,290 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 08:37:34,459 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:37:34,734 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 08:37:34,956 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 08:37:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:36,619 INFO L93 Difference]: Finished difference Result 4589 states and 6821 transitions. [2020-12-22 08:37:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:37:36,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-12-22 08:37:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:36,629 INFO L225 Difference]: With dead ends: 4589 [2020-12-22 08:37:36,629 INFO L226 Difference]: Without dead ends: 4166 [2020-12-22 08:37:36,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-12-22 08:37:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2020-12-22 08:37:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 896. [2020-12-22 08:37:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 08:37:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1305 transitions. [2020-12-22 08:37:37,043 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1305 transitions. Word has length 56 [2020-12-22 08:37:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:37,043 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1305 transitions. [2020-12-22 08:37:37,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:37:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1305 transitions. [2020-12-22 08:37:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:37:37,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:37,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:37,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:37:37,044 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1179705887, now seen corresponding path program 1 times [2020-12-22 08:37:37,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:37,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725740844] [2020-12-22 08:37:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:37,736 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 08:37:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725740844] [2020-12-22 08:37:37,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:37,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-22 08:37:37,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287228591] [2020-12-22 08:37:37,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 08:37:37,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 08:37:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:37:37,739 INFO L87 Difference]: Start difference. First operand 896 states and 1305 transitions. Second operand 15 states. [2020-12-22 08:37:38,276 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:37:38,541 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 08:37:38,703 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-22 08:37:38,867 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-12-22 08:37:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:41,131 INFO L93 Difference]: Finished difference Result 4409 states and 6527 transitions. [2020-12-22 08:37:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:37:41,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-12-22 08:37:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:41,142 INFO L225 Difference]: With dead ends: 4409 [2020-12-22 08:37:41,143 INFO L226 Difference]: Without dead ends: 3996 [2020-12-22 08:37:41,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:37:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2020-12-22 08:37:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 901. [2020-12-22 08:37:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 901 states. [2020-12-22 08:37:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1311 transitions. [2020-12-22 08:37:41,507 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1311 transitions. Word has length 56 [2020-12-22 08:37:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:41,507 INFO L481 AbstractCegarLoop]: Abstraction has 901 states and 1311 transitions. [2020-12-22 08:37:41,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 08:37:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1311 transitions. [2020-12-22 08:37:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:37:41,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:41,508 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] [2020-12-22 08:37:41,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:37:41,508 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash -684019272, now seen corresponding path program 1 times [2020-12-22 08:37:41,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:41,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483165682] [2020-12-22 08:37:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:42,361 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 08:37:42,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483165682] [2020-12-22 08:37:42,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:42,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:37:42,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643191252] [2020-12-22 08:37:42,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:37:42,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:37:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:37:42,363 INFO L87 Difference]: Start difference. First operand 901 states and 1311 transitions. Second operand 18 states. [2020-12-22 08:37:43,147 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 08:37:43,450 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-22 08:37:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:45,954 INFO L93 Difference]: Finished difference Result 3776 states and 5596 transitions. [2020-12-22 08:37:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 08:37:45,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-12-22 08:37:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:45,961 INFO L225 Difference]: With dead ends: 3776 [2020-12-22 08:37:45,962 INFO L226 Difference]: Without dead ends: 3363 [2020-12-22 08:37:45,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:37:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2020-12-22 08:37:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 887. [2020-12-22 08:37:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-12-22 08:37:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1295 transitions. [2020-12-22 08:37:46,473 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1295 transitions. Word has length 57 [2020-12-22 08:37:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:46,473 INFO L481 AbstractCegarLoop]: Abstraction has 887 states and 1295 transitions. [2020-12-22 08:37:46,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:37:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1295 transitions. [2020-12-22 08:37:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:37:46,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:46,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:46,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:37:46,475 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1531780676, now seen corresponding path program 1 times [2020-12-22 08:37:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:46,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936753785] [2020-12-22 08:37:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:46,525 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 08:37:46,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936753785] [2020-12-22 08:37:46,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:46,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:46,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953601545] [2020-12-22 08:37:46,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:46,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:46,527 INFO L87 Difference]: Start difference. First operand 887 states and 1295 transitions. Second operand 3 states. [2020-12-22 08:37:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:47,256 INFO L93 Difference]: Finished difference Result 2391 states and 3521 transitions. [2020-12-22 08:37:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:47,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 08:37:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:47,260 INFO L225 Difference]: With dead ends: 2391 [2020-12-22 08:37:47,260 INFO L226 Difference]: Without dead ends: 1577 [2020-12-22 08:37:47,261 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 08:37:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-12-22 08:37:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1555. [2020-12-22 08:37:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1555 states. [2020-12-22 08:37:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2235 transitions. [2020-12-22 08:37:47,902 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2235 transitions. Word has length 75 [2020-12-22 08:37:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:47,903 INFO L481 AbstractCegarLoop]: Abstraction has 1555 states and 2235 transitions. [2020-12-22 08:37:47,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2235 transitions. [2020-12-22 08:37:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 08:37:47,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:47,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:47,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:37:47,905 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:47,906 INFO L82 PathProgramCache]: Analyzing trace with hash 241252331, now seen corresponding path program 1 times [2020-12-22 08:37:47,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:47,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973961416] [2020-12-22 08:37:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:47,955 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 08:37:47,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973961416] [2020-12-22 08:37:47,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:47,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:47,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084398737] [2020-12-22 08:37:47,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:47,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:47,958 INFO L87 Difference]: Start difference. First operand 1555 states and 2235 transitions. Second operand 3 states. [2020-12-22 08:37:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:49,816 INFO L93 Difference]: Finished difference Result 4359 states and 6269 transitions. [2020-12-22 08:37:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:49,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 08:37:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:49,820 INFO L225 Difference]: With dead ends: 4359 [2020-12-22 08:37:49,820 INFO L226 Difference]: Without dead ends: 2877 [2020-12-22 08:37:49,822 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 08:37:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2020-12-22 08:37:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2715. [2020-12-22 08:37:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2715 states. [2020-12-22 08:37:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 3871 transitions. [2020-12-22 08:37:50,976 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 3871 transitions. Word has length 76 [2020-12-22 08:37:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:50,977 INFO L481 AbstractCegarLoop]: Abstraction has 2715 states and 3871 transitions. [2020-12-22 08:37:50,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 3871 transitions. [2020-12-22 08:37:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:37:50,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:50,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:50,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:37:50,979 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1306565925, now seen corresponding path program 1 times [2020-12-22 08:37:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:50,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550562017] [2020-12-22 08:37:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:51,027 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 08:37:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550562017] [2020-12-22 08:37:51,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:51,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:37:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506460413] [2020-12-22 08:37:51,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:37:51,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:37:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:37:51,029 INFO L87 Difference]: Start difference. First operand 2715 states and 3871 transitions. Second operand 3 states. [2020-12-22 08:37:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:53,072 INFO L93 Difference]: Finished difference Result 7679 states and 10897 transitions. [2020-12-22 08:37:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:37:53,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 08:37:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:53,077 INFO L225 Difference]: With dead ends: 7679 [2020-12-22 08:37:53,077 INFO L226 Difference]: Without dead ends: 5037 [2020-12-22 08:37:53,081 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 08:37:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2020-12-22 08:37:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 4715. [2020-12-22 08:37:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-12-22 08:37:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 6623 transitions. [2020-12-22 08:37:55,011 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 6623 transitions. Word has length 77 [2020-12-22 08:37:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:37:55,012 INFO L481 AbstractCegarLoop]: Abstraction has 4715 states and 6623 transitions. [2020-12-22 08:37:55,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:37:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 6623 transitions. [2020-12-22 08:37:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:37:55,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:37:55,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:37:55,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:37:55,014 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:37:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:37:55,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1695604898, now seen corresponding path program 1 times [2020-12-22 08:37:55,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:37:55,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327693945] [2020-12-22 08:37:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:37:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:37:55,118 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 08:37:55,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327693945] [2020-12-22 08:37:55,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:37:55,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:37:55,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617182330] [2020-12-22 08:37:55,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:37:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:37:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:37:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:37:55,121 INFO L87 Difference]: Start difference. First operand 4715 states and 6623 transitions. Second operand 6 states. [2020-12-22 08:37:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:37:58,988 INFO L93 Difference]: Finished difference Result 8285 states and 11491 transitions. [2020-12-22 08:37:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:37:58,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:37:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:37:58,996 INFO L225 Difference]: With dead ends: 8285 [2020-12-22 08:37:58,996 INFO L226 Difference]: Without dead ends: 8283 [2020-12-22 08:37:58,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:37:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2020-12-22 08:38:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 4907. [2020-12-22 08:38:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4907 states. [2020-12-22 08:38:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4907 states to 4907 states and 6775 transitions. [2020-12-22 08:38:01,081 INFO L78 Accepts]: Start accepts. Automaton has 4907 states and 6775 transitions. Word has length 78 [2020-12-22 08:38:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:01,081 INFO L481 AbstractCegarLoop]: Abstraction has 4907 states and 6775 transitions. [2020-12-22 08:38:01,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:38:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4907 states and 6775 transitions. [2020-12-22 08:38:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:38:01,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:01,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:01,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:38:01,083 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1415916470, now seen corresponding path program 1 times [2020-12-22 08:38:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:01,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970213802] [2020-12-22 08:38:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:01,133 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 08:38:01,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970213802] [2020-12-22 08:38:01,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:01,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:38:01,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120308545] [2020-12-22 08:38:01,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:38:01,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:38:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:38:01,136 INFO L87 Difference]: Start difference. First operand 4907 states and 6775 transitions. Second operand 3 states. [2020-12-22 08:38:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:04,664 INFO L93 Difference]: Finished difference Result 12751 states and 17589 transitions. [2020-12-22 08:38:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:38:04,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:38:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:04,672 INFO L225 Difference]: With dead ends: 12751 [2020-12-22 08:38:04,673 INFO L226 Difference]: Without dead ends: 7917 [2020-12-22 08:38:04,680 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 08:38:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7917 states. [2020-12-22 08:38:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7917 to 7307. [2020-12-22 08:38:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7307 states. [2020-12-22 08:38:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7307 states to 7307 states and 9903 transitions. [2020-12-22 08:38:07,852 INFO L78 Accepts]: Start accepts. Automaton has 7307 states and 9903 transitions. Word has length 79 [2020-12-22 08:38:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:07,852 INFO L481 AbstractCegarLoop]: Abstraction has 7307 states and 9903 transitions. [2020-12-22 08:38:07,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:38:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7307 states and 9903 transitions. [2020-12-22 08:38:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 08:38:07,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:07,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:07,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:38:07,856 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1940322908, now seen corresponding path program 1 times [2020-12-22 08:38:07,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:07,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218265226] [2020-12-22 08:38:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:38:07,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218265226] [2020-12-22 08:38:07,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:38:07,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:38:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74576034] [2020-12-22 08:38:07,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:38:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:38:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:38:07,930 INFO L87 Difference]: Start difference. First operand 7307 states and 9903 transitions. Second operand 3 states. [2020-12-22 08:38:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:11,246 INFO L93 Difference]: Finished difference Result 14429 states and 19567 transitions. [2020-12-22 08:38:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:38:11,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 08:38:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:11,255 INFO L225 Difference]: With dead ends: 14429 [2020-12-22 08:38:11,255 INFO L226 Difference]: Without dead ends: 7195 [2020-12-22 08:38:11,262 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 08:38:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2020-12-22 08:38:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 7193. [2020-12-22 08:38:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7193 states. [2020-12-22 08:38:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7193 states to 7193 states and 9583 transitions. [2020-12-22 08:38:14,530 INFO L78 Accepts]: Start accepts. Automaton has 7193 states and 9583 transitions. Word has length 100 [2020-12-22 08:38:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:14,531 INFO L481 AbstractCegarLoop]: Abstraction has 7193 states and 9583 transitions. [2020-12-22 08:38:14,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:38:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 7193 states and 9583 transitions. [2020-12-22 08:38:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 08:38:14,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:14,533 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:14,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:38:14,533 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1124551470, now seen corresponding path program 1 times [2020-12-22 08:38:14,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:14,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36872477] [2020-12-22 08:38:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:38:14,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36872477] [2020-12-22 08:38:14,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764326258] [2020-12-22 08:38:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:38:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 08:38:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:38:15,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-22 08:38:15,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 08:38:15,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 08:38:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174351115] [2020-12-22 08:38:15,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:38:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:38:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:38:15,573 INFO L87 Difference]: Start difference. First operand 7193 states and 9583 transitions. Second operand 12 states. [2020-12-22 08:38:16,173 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 08:38:16,701 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 08:38:16,836 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 08:38:17,136 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 08:38:17,472 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 08:38:17,786 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 08:38:18,003 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 08:38:18,154 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 08:38:18,384 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:38:18,601 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 08:38:18,793 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-22 08:38:18,987 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:38:19,326 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 08:38:19,769 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-12-22 08:38:19,962 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 08:38:22,968 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 08:38:23,393 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 08:38:23,964 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 08:38:24,137 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 08:38:24,652 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 08:38:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:38:39,411 INFO L93 Difference]: Finished difference Result 41671 states and 54838 transitions. [2020-12-22 08:38:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 08:38:39,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-22 08:38:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:38:39,532 INFO L225 Difference]: With dead ends: 41671 [2020-12-22 08:38:39,532 INFO L226 Difference]: Without dead ends: 34551 [2020-12-22 08:38:39,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=456, Invalid=1266, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 08:38:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34551 states. [2020-12-22 08:38:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34551 to 17319. [2020-12-22 08:38:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17319 states. [2020-12-22 08:38:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17319 states to 17319 states and 23038 transitions. [2020-12-22 08:38:49,618 INFO L78 Accepts]: Start accepts. Automaton has 17319 states and 23038 transitions. Word has length 100 [2020-12-22 08:38:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:38:49,618 INFO L481 AbstractCegarLoop]: Abstraction has 17319 states and 23038 transitions. [2020-12-22 08:38:49,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:38:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17319 states and 23038 transitions. [2020-12-22 08:38:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 08:38:49,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:38:49,624 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:38:49,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 08:38:49,838 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:38:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:38:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash -13722873, now seen corresponding path program 1 times [2020-12-22 08:38:49,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:38:49,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455942128] [2020-12-22 08:38:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:38:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:38:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455942128] [2020-12-22 08:38:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255349294] [2020-12-22 08:38:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:38:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:38:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 08:38:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:38:50,683 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:38:50,845 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:38:50,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:38:51,157 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 08:38:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:38:51,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:38:51,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2020-12-22 08:38:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697929904] [2020-12-22 08:38:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 08:38:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:38:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 08:38:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-12-22 08:38:51,794 INFO L87 Difference]: Start difference. First operand 17319 states and 23038 transitions. Second operand 20 states. [2020-12-22 08:38:51,984 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 08:38:52,678 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-12-22 08:38:52,845 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 08:38:53,100 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 08:38:53,542 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-12-22 08:38:53,725 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-12-22 08:38:53,985 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-12-22 08:38:54,782 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-12-22 08:38:54,996 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-12-22 08:38:55,254 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 08:38:55,466 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-12-22 08:38:55,644 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-12-22 08:38:55,847 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2020-12-22 08:38:56,028 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 08:38:56,191 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-12-22 08:38:56,649 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 08:38:56,818 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2020-12-22 08:38:57,009 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 08:38:57,675 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:38:58,024 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-22 08:38:58,377 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 08:38:58,683 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 08:38:58,879 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 08:38:59,042 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-22 08:38:59,328 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-22 08:38:59,625 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 08:38:59,796 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-12-22 08:39:00,010 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-22 08:39:00,233 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-22 08:39:00,431 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-12-22 08:39:00,588 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-12-22 08:39:01,022 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 08:39:01,430 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2020-12-22 08:39:01,784 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-22 08:39:02,237 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 08:39:02,474 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 08:39:02,841 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-22 08:39:03,480 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-22 08:39:03,743 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 08:39:04,031 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-12-22 08:39:04,244 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-22 08:39:04,454 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-12-22 08:39:04,913 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 08:39:05,285 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-22 08:39:05,506 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-12-22 08:39:05,948 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-22 08:39:06,258 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-12-22 08:39:06,594 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-22 08:39:07,030 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-22 08:39:07,455 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-12-22 08:39:07,789 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-22 08:39:07,981 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-12-22 08:39:08,389 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-12-22 08:39:08,593 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-12-22 08:39:16,716 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 08:39:18,143 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-12-22 08:39:18,571 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:39:19,605 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 08:39:19,882 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-12-22 08:39:20,190 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 08:39:20,484 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-22 08:39:21,535 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 08:39:21,826 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-22 08:39:22,065 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:39:22,344 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-12-22 08:39:22,600 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-12-22 08:39:22,927 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-22 08:39:23,418 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 08:39:24,301 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 08:39:24,586 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 08:39:24,996 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 08:39:25,497 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-12-22 08:39:25,949 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-12-22 08:39:26,240 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-12-22 08:39:26,469 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-22 08:39:27,513 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 08:39:27,859 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:39:28,113 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-12-22 08:39:28,350 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-12-22 08:39:28,704 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-12-22 08:39:28,983 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-12-22 08:39:29,234 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-22 08:39:29,520 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-12-22 08:39:29,789 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-12-22 08:39:30,919 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:39:31,180 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 08:39:31,522 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 08:39:31,796 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-22 08:39:32,053 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-12-22 08:39:33,354 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 08:39:33,769 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-12-22 08:40:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:22,579 INFO L93 Difference]: Finished difference Result 103549 states and 134961 transitions. [2020-12-22 08:40:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-22 08:40:22,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-12-22 08:40:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:22,748 INFO L225 Difference]: With dead ends: 103549 [2020-12-22 08:40:22,748 INFO L226 Difference]: Without dead ends: 96429 [2020-12-22 08:40:22,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6841 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=2844, Invalid=15788, Unknown=0, NotChecked=0, Total=18632 [2020-12-22 08:40:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96429 states. [2020-12-22 08:40:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96429 to 17297. [2020-12-22 08:40:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17297 states. [2020-12-22 08:40:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17297 states to 17297 states and 23014 transitions. [2020-12-22 08:40:33,088 INFO L78 Accepts]: Start accepts. Automaton has 17297 states and 23014 transitions. Word has length 101 [2020-12-22 08:40:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:33,088 INFO L481 AbstractCegarLoop]: Abstraction has 17297 states and 23014 transitions. [2020-12-22 08:40:33,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 08:40:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 17297 states and 23014 transitions. [2020-12-22 08:40:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 08:40:33,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:33,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:33,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 08:40:33,308 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1589646215, now seen corresponding path program 1 times [2020-12-22 08:40:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:33,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304326354] [2020-12-22 08:40:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:33,975 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2020-12-22 08:40:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:34,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304326354] [2020-12-22 08:40:34,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178047246] [2020-12-22 08:40:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:40:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 08:40:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:40:34,950 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 08:40:35,030 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:40:35,253 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:40:35,604 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 08:40:36,186 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.