/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/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:07:35,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:07:35,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:07:35,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:07:35,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:07:35,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:07:35,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:07:35,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:07:35,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:07:35,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:07:35,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:07:35,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:07:35,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:07:35,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:07:35,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:07:35,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:07:35,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:07:35,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:07:35,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:07:35,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:07:35,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:07:35,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:07:35,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:07:35,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:07:35,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:07:35,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:07:35,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:07:35,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:07:35,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:07:35,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:07:35,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:07:35,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:07:35,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:07:35,393 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:07:35,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:07:35,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:07:35,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:07:35,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:07:35,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:07:35,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:07:35,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:07:35,396 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:07:35,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:07:35,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:07:35,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:07:35,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:07:35,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:07:35,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:07:35,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:07:35,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:07:35,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:07:35,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:07:35,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:07:35,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:07:35,398 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:07:35,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:07:35,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:07:35,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:07:35,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:07:35,836 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:07:35,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2020-12-23 07:07:35,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ef3d976cd/acee9f2e649a4a8388b32604d6bd794e/FLAG83368aa31 [2020-12-23 07:07:36,543 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:07:36,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2020-12-23 07:07:36,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ef3d976cd/acee9f2e649a4a8388b32604d6bd794e/FLAG83368aa31 [2020-12-23 07:07:36,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ef3d976cd/acee9f2e649a4a8388b32604d6bd794e [2020-12-23 07:07:36,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:07:36,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:07:36,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:36,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:07:36,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:07:36,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:36" (1/1) ... [2020-12-23 07:07:36,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d67c19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:36, skipping insertion in model container [2020-12-23 07:07:36,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:07:36" (1/1) ... [2020-12-23 07:07:36,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:07:36,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:07:37,136 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:07:37,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:37,165 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:07:37,180 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:07:37,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:07:37,203 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:07:37,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37 WrapperNode [2020-12-23 07:07:37,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:07:37,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:37,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:07:37,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:07:37,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:07:37,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:07:37,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:07:37,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:07:37,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... [2020-12-23 07:07:37,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:07:37,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:07:37,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:07:37,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:07:37,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:07:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:07:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:07:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:07:37,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:07:37,722 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 07:07:37,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:37 BoogieIcfgContainer [2020-12-23 07:07:37,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:07:37,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:07:37,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:07:37,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:07:37,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:07:36" (1/3) ... [2020-12-23 07:07:37,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c861387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:37, skipping insertion in model container [2020-12-23 07:07:37,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:07:37" (2/3) ... [2020-12-23 07:07:37,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c861387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:07:37, skipping insertion in model container [2020-12-23 07:07:37,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:07:37" (3/3) ... [2020-12-23 07:07:37,735 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2020-12-23 07:07:37,744 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:07:37,750 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:07:37,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:07:37,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:07:37,839 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:07:37,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:07:37,839 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:07:37,839 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:07:37,839 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:07:37,840 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:07:37,840 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:07:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 07:07:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:37,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:37,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:37,864 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2020-12-23 07:07:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:37,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961296234] [2020-12-23 07:07:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:38,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961296234] [2020-12-23 07:07:38,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:38,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:07:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724953119] [2020-12-23 07:07:38,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:07:38,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:07:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:07:38,077 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 07:07:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:38,098 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-12-23 07:07:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:07:38,100 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 07:07:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:38,110 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:07:38,110 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 07:07:38,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:07:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 07:07:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 07:07:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 07:07:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-23 07:07:38,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2020-12-23 07:07:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:38,155 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-23 07:07:38,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:07:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-23 07:07:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 07:07:38,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:38,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:07:38,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2020-12-23 07:07:38,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:38,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589263019] [2020-12-23 07:07:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:07:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589263019] [2020-12-23 07:07:38,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:38,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:38,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217455690] [2020-12-23 07:07:38,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:38,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:38,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:38,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:38,227 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-23 07:07:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:38,269 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-23 07:07:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:38,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 07:07:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:38,271 INFO L225 Difference]: With dead ends: 26 [2020-12-23 07:07:38,271 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:07:38,272 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 [2020-12-23 07:07:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:07:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:07:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:07:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 07:07:38,277 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 7 [2020-12-23 07:07:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:38,277 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 07:07:38,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 07:07:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:07:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:38,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:07:38,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:38,280 INFO L82 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2020-12-23 07:07:38,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:38,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507427948] [2020-12-23 07:07:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:38,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507427948] [2020-12-23 07:07:38,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:38,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:38,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288928944] [2020-12-23 07:07:38,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:38,333 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-12-23 07:07:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:38,346 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 07:07:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:38,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 07:07:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:38,347 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:07:38,348 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:07:38,348 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 [2020-12-23 07:07:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:07:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:07:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:07:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 07:07:38,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2020-12-23 07:07:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:38,353 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 07:07:38,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 07:07:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:07:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:38,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:07:38,355 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash 698628545, now seen corresponding path program 1 times [2020-12-23 07:07:38,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:38,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713329095] [2020-12-23 07:07:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713329095] [2020-12-23 07:07:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557572047] [2020-12-23 07:07:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:07:38,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:38,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:38,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 07:07:38,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863168080] [2020-12-23 07:07:38,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:07:38,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:07:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:38,637 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-23 07:07:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:38,694 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-23 07:07:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:07:38,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 07:07:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:38,697 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:07:38,697 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:07:38,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:07:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:07:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 07:07:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:07:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 07:07:38,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-12-23 07:07:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:38,713 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 07:07:38,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:07:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 07:07:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:07:38,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:38,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:38,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:38,933 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash 526975844, now seen corresponding path program 2 times [2020-12-23 07:07:38,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:38,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495433722] [2020-12-23 07:07:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495433722] [2020-12-23 07:07:39,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:07:39,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:07:39,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855686103] [2020-12-23 07:07:39,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:07:39,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:07:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:07:39,013 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2020-12-23 07:07:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,040 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-23 07:07:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:07:39,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 07:07:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,043 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:07:39,044 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:07:39,045 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 [2020-12-23 07:07:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:07:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 07:07:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 07:07:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 07:07:39,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-12-23 07:07:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,055 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 07:07:39,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:07:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 07:07:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:07:39,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 07:07:39,058 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash 552494793, now seen corresponding path program 1 times [2020-12-23 07:07:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663187324] [2020-12-23 07:07:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663187324] [2020-12-23 07:07:39,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461886602] [2020-12-23 07:07:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:39,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 07:07:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119752168] [2020-12-23 07:07:39,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:07:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:07:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:39,219 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-12-23 07:07:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,248 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:07:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:07:39,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 07:07:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,249 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:07:39,250 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:07:39,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:07:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:07:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 07:07:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:07:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 07:07:39,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2020-12-23 07:07:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,256 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 07:07:39,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:07:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 07:07:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:07:39,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,257 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:39,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1373657364, now seen corresponding path program 2 times [2020-12-23 07:07:39,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441560586] [2020-12-23 07:07:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441560586] [2020-12-23 07:07:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664787337] [2020-12-23 07:07:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:07:39,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:39,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:39,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:39,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 07:07:39,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862734314] [2020-12-23 07:07:39,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:07:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:07:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:39,669 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-12-23 07:07:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:39,702 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-23 07:07:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:07:39,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:07:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:39,704 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:07:39,704 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:07:39,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:07:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:07:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:07:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:07:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:07:39,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-12-23 07:07:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:39,710 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:07:39,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:07:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:07:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:07:39,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:39,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:39,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:39,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1274975665, now seen corresponding path program 3 times [2020-12-23 07:07:39,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:39,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753956122] [2020-12-23 07:07:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:07:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753956122] [2020-12-23 07:07:40,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25489145] [2020-12-23 07:07:40,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:07:40,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:40,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:07:40,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:40,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-23 07:07:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717912110] [2020-12-23 07:07:40,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:40,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:40,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:40,173 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-23 07:07:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:40,311 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-12-23 07:07:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:07:40,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 07:07:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:40,313 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:07:40,313 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:07:40,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:07:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-23 07:07:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:07:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-23 07:07:40,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-12-23 07:07:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:40,320 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-23 07:07:40,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-23 07:07:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:07:40,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:40,321 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:40,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,536 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:40,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1200989882, now seen corresponding path program 4 times [2020-12-23 07:07:40,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:40,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752613736] [2020-12-23 07:07:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:40,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752613736] [2020-12-23 07:07:40,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568005840] [2020-12-23 07:07:40,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:40,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:40,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:40,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:40,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:40,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 07:07:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094252775] [2020-12-23 07:07:40,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:07:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:07:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:40,814 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2020-12-23 07:07:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:40,865 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-23 07:07:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:07:40,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 07:07:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:40,867 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:07:40,867 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:07:40,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:07:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:07:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 07:07:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:07:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 07:07:40,884 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-23 07:07:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:40,886 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 07:07:40,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:07:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 07:07:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:07:40,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:40,887 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:41,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,101 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 809863479, now seen corresponding path program 5 times [2020-12-23 07:07:41,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:41,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108446613] [2020-12-23 07:07:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:41,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108446613] [2020-12-23 07:07:41,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802534274] [2020-12-23 07:07:41,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 07:07:41,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:07:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:41,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:41,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 07:07:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722452917] [2020-12-23 07:07:41,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:07:41,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:07:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:41,290 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-12-23 07:07:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:41,332 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 07:07:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:07:41,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-23 07:07:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:41,333 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:07:41,333 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:07:41,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:07:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:07:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:07:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:07:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-23 07:07:41,339 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-12-23 07:07:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:41,339 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-23 07:07:41,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:07:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-23 07:07:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:07:41,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:41,340 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:41,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,554 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1400455052, now seen corresponding path program 6 times [2020-12-23 07:07:41,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:41,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39985023] [2020-12-23 07:07:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:07:41,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39985023] [2020-12-23 07:07:41,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033131576] [2020-12-23 07:07:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:41,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:07:41,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:07:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:07:41,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:41,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-23 07:07:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497677526] [2020-12-23 07:07:41,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:07:41,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:07:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:07:41,773 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 14 states. [2020-12-23 07:07:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:41,977 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-12-23 07:07:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:41,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-23 07:07:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:41,978 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:07:41,978 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:07:41,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:07:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-12-23 07:07:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:07:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 07:07:41,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-12-23 07:07:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:41,984 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 07:07:41,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:07:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 07:07:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:07:41,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:41,985 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:42,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:42,201 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1918510309, now seen corresponding path program 7 times [2020-12-23 07:07:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174120227] [2020-12-23 07:07:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:42,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174120227] [2020-12-23 07:07:42,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086031463] [2020-12-23 07:07:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:42,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:42,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:42,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 07:07:42,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584292198] [2020-12-23 07:07:42,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:07:42,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:42,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:07:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:42,559 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 12 states. [2020-12-23 07:07:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:42,616 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-23 07:07:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:07:42,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 07:07:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:42,621 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:07:42,621 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:07:42,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:07:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:07:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:07:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:07:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-23 07:07:42,642 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-12-23 07:07:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:42,643 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-23 07:07:42,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:07:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-23 07:07:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 07:07:42,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:42,644 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:42,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:07:42,846 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash -727277058, now seen corresponding path program 8 times [2020-12-23 07:07:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:42,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571960278] [2020-12-23 07:07:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:42,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571960278] [2020-12-23 07:07:42,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141277459] [2020-12-23 07:07:42,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:43,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:43,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:43,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 07:07:43,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570080826] [2020-12-23 07:07:43,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:07:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:07:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:43,078 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2020-12-23 07:07:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:43,144 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-23 07:07:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:07:43,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-12-23 07:07:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:43,146 INFO L225 Difference]: With dead ends: 52 [2020-12-23 07:07:43,146 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:07:43,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:07:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:07:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:07:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:07:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-23 07:07:43,151 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2020-12-23 07:07:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:43,152 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-23 07:07:43,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:07:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-23 07:07:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:07:43,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:43,153 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:43,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,362 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1586576417, now seen corresponding path program 9 times [2020-12-23 07:07:43,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:43,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430977635] [2020-12-23 07:07:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 07:07:43,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430977635] [2020-12-23 07:07:43,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747038392] [2020-12-23 07:07:43,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:43,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:07:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:07:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-23 07:07:43,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:43,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-23 07:07:43,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591427344] [2020-12-23 07:07:43,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:43,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:43,686 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 18 states. [2020-12-23 07:07:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:43,899 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-12-23 07:07:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:43,899 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-12-23 07:07:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:43,900 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:07:43,900 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:07:43,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:07:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-12-23 07:07:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 07:07:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-23 07:07:43,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-12-23 07:07:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:43,906 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-23 07:07:43,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-23 07:07:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:07:43,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:43,908 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:44,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:44,124 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -275333016, now seen corresponding path program 10 times [2020-12-23 07:07:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915092506] [2020-12-23 07:07:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:44,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915092506] [2020-12-23 07:07:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694744673] [2020-12-23 07:07:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:44,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:44,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:07:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:44,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:44,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 07:07:44,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077185131] [2020-12-23 07:07:44,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:07:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:07:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:44,384 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2020-12-23 07:07:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:44,460 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-23 07:07:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:07:44,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-12-23 07:07:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:44,461 INFO L225 Difference]: With dead ends: 58 [2020-12-23 07:07:44,462 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 07:07:44,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:07:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 07:07:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 07:07:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 07:07:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-23 07:07:44,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2020-12-23 07:07:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:44,468 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-23 07:07:44,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:07:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-23 07:07:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:07:44,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:44,470 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:44,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:07:44,684 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash 234226725, now seen corresponding path program 11 times [2020-12-23 07:07:44,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:44,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411558588] [2020-12-23 07:07:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411558588] [2020-12-23 07:07:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494554992] [2020-12-23 07:07:44,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:44,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 07:07:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 07:07:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:45,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:45,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 07:07:45,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642024232] [2020-12-23 07:07:45,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 07:07:45,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 07:07:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:45,018 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 16 states. [2020-12-23 07:07:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:45,097 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-12-23 07:07:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:07:45,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-23 07:07:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:45,098 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:07:45,098 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 07:07:45,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:07:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 07:07:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 07:07:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 07:07:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-23 07:07:45,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-12-23 07:07:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:45,105 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-23 07:07:45,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 07:07:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-23 07:07:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:07:45,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:45,107 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:45,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:07:45,321 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 294866082, now seen corresponding path program 12 times [2020-12-23 07:07:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:45,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006048898] [2020-12-23 07:07:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:07:45,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006048898] [2020-12-23 07:07:45,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693495973] [2020-12-23 07:07:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:45,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 07:07:45,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:07:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-23 07:07:45,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:45,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2020-12-23 07:07:45,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681327718] [2020-12-23 07:07:45,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:45,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:45,702 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2020-12-23 07:07:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:46,001 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-12-23 07:07:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 07:07:46,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2020-12-23 07:07:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:46,003 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:07:46,003 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:07:46,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:07:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:07:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-12-23 07:07:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:07:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-12-23 07:07:46,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2020-12-23 07:07:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:46,010 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-12-23 07:07:46,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-12-23 07:07:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:07:46,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,011 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:46,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:07:46,226 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1121567891, now seen corresponding path program 13 times [2020-12-23 07:07:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:46,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007603937] [2020-12-23 07:07:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:46,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007603937] [2020-12-23 07:07:46,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250808317] [2020-12-23 07:07:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:07:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:46,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:46,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 07:07:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271201774] [2020-12-23 07:07:46,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:07:46,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:07:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:46,564 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2020-12-23 07:07:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:46,653 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-12-23 07:07:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:07:46,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-23 07:07:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:46,654 INFO L225 Difference]: With dead ends: 66 [2020-12-23 07:07:46,654 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 07:07:46,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:07:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 07:07:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-23 07:07:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:07:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-23 07:07:46,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 42 [2020-12-23 07:07:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:46,664 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-23 07:07:46,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:07:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-23 07:07:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 07:07:46,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:46,665 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:46,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:46,879 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:46,880 INFO L82 PathProgramCache]: Analyzing trace with hash 635681040, now seen corresponding path program 14 times [2020-12-23 07:07:46,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:46,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886556159] [2020-12-23 07:07:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886556159] [2020-12-23 07:07:47,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276978668] [2020-12-23 07:07:47,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:47,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:47,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:07:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:47,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:47,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 07:07:47,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691669539] [2020-12-23 07:07:47,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:07:47,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:07:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:47,248 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-12-23 07:07:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:47,305 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-12-23 07:07:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:07:47,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-23 07:07:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:47,307 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:07:47,307 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:07:47,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:07:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:07:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 07:07:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 07:07:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-23 07:07:47,313 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 44 [2020-12-23 07:07:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:47,313 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-23 07:07:47,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:07:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-23 07:07:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:07:47,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:47,314 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:47,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:47,529 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:47,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1429756403, now seen corresponding path program 15 times [2020-12-23 07:07:47,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:47,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221524939] [2020-12-23 07:07:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 07:07:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221524939] [2020-12-23 07:07:47,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343876523] [2020-12-23 07:07:47,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:07:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-12-23 07:07:47,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:47,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2020-12-23 07:07:47,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126550500] [2020-12-23 07:07:47,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:47,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:47,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:47,941 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2020-12-23 07:07:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,042 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-12-23 07:07:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:48,042 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-12-23 07:07:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,045 INFO L225 Difference]: With dead ends: 73 [2020-12-23 07:07:48,045 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:07:48,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:07:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 07:07:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 07:07:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-12-23 07:07:48,052 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 46 [2020-12-23 07:07:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,052 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-12-23 07:07:48,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-12-23 07:07:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 07:07:48,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,053 INFO L422 BasicCegarLoop]: trace histogram [19, 17, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:48,267 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash 527553147, now seen corresponding path program 16 times [2020-12-23 07:07:48,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579200289] [2020-12-23 07:07:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579200289] [2020-12-23 07:07:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379729869] [2020-12-23 07:07:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:48,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:07:48,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:48,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:48,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 07:07:48,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497857993] [2020-12-23 07:07:48,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 07:07:48,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 07:07:48,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:48,650 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 21 states. [2020-12-23 07:07:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:48,765 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-12-23 07:07:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:07:48,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-12-23 07:07:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:48,767 INFO L225 Difference]: With dead ends: 76 [2020-12-23 07:07:48,767 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:07:48,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:07:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:07:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 07:07:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 07:07:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-23 07:07:48,773 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-12-23 07:07:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:48,773 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-23 07:07:48,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 07:07:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-23 07:07:48,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 07:07:48,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:48,774 INFO L422 BasicCegarLoop]: trace histogram [20, 18, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:48,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:07:48,988 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1291123998, now seen corresponding path program 17 times [2020-12-23 07:07:48,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:48,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947831204] [2020-12-23 07:07:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947831204] [2020-12-23 07:07:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441658602] [2020-12-23 07:07:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:49,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 07:07:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:07:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:49,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:49,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 07:07:49,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379022557] [2020-12-23 07:07:49,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 07:07:49,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 07:07:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:49,513 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 22 states. [2020-12-23 07:07:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:49,632 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-12-23 07:07:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 07:07:49,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-23 07:07:49,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:49,634 INFO L225 Difference]: With dead ends: 78 [2020-12-23 07:07:49,634 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:07:49,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:07:49,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:07:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 07:07:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 07:07:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-12-23 07:07:49,647 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-12-23 07:07:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:49,647 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-12-23 07:07:49,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 07:07:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-12-23 07:07:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 07:07:49,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:49,649 INFO L422 BasicCegarLoop]: trace histogram [21, 19, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:49,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:07:49,863 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash 643304193, now seen corresponding path program 18 times [2020-12-23 07:07:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:49,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376836964] [2020-12-23 07:07:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 07:07:50,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376836964] [2020-12-23 07:07:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315979125] [2020-12-23 07:07:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:50,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 07:07:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:07:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 61 proven. 15 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-23 07:07:50,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:50,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2020-12-23 07:07:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923229587] [2020-12-23 07:07:50,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 07:07:50,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:50,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 07:07:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:07:50,440 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 29 states. [2020-12-23 07:07:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,056 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-23 07:07:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:07:51,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 54 [2020-12-23 07:07:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,057 INFO L225 Difference]: With dead ends: 87 [2020-12-23 07:07:51,057 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:07:51,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:07:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:07:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2020-12-23 07:07:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 07:07:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-12-23 07:07:51,064 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 54 [2020-12-23 07:07:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,064 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-12-23 07:07:51,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 07:07:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-12-23 07:07:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 07:07:51,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,065 INFO L422 BasicCegarLoop]: trace histogram [22, 20, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:51,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:07:51,279 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:51,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash 852476360, now seen corresponding path program 19 times [2020-12-23 07:07:51,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:51,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552340589] [2020-12-23 07:07:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:51,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552340589] [2020-12-23 07:07:51,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258485114] [2020-12-23 07:07:51,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:07:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:51,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:51,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 07:07:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909857541] [2020-12-23 07:07:51,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 07:07:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 07:07:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:07:51,786 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 24 states. [2020-12-23 07:07:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:51,882 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-23 07:07:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 07:07:51,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-12-23 07:07:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:51,884 INFO L225 Difference]: With dead ends: 84 [2020-12-23 07:07:51,884 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 07:07:51,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:07:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 07:07:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-23 07:07:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:07:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-12-23 07:07:51,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2020-12-23 07:07:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:51,891 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-12-23 07:07:51,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 07:07:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-12-23 07:07:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 07:07:51,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:51,892 INFO L422 BasicCegarLoop]: trace histogram [23, 21, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:52,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:07:52,106 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1906895301, now seen corresponding path program 20 times [2020-12-23 07:07:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:52,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114418693] [2020-12-23 07:07:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114418693] [2020-12-23 07:07:52,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685063085] [2020-12-23 07:07:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:52,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:07:52,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:07:52,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:52,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:52,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 07:07:52,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174205318] [2020-12-23 07:07:52,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 07:07:52,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:52,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 07:07:52,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:52,632 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 25 states. [2020-12-23 07:07:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:52,774 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2020-12-23 07:07:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 07:07:52,775 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-12-23 07:07:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:52,776 INFO L225 Difference]: With dead ends: 86 [2020-12-23 07:07:52,776 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 07:07:52,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:07:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 07:07:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 07:07:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 07:07:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-12-23 07:07:52,781 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2020-12-23 07:07:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:52,781 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-12-23 07:07:52,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 07:07:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-12-23 07:07:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 07:07:52,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:52,782 INFO L422 BasicCegarLoop]: trace histogram [24, 22, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:52,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:07:52,997 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1591215746, now seen corresponding path program 21 times [2020-12-23 07:07:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:52,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134830376] [2020-12-23 07:07:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:07:53,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134830376] [2020-12-23 07:07:53,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112558767] [2020-12-23 07:07:53,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:53,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:07:53,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:53,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:07:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-23 07:07:53,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:53,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2020-12-23 07:07:53,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704124095] [2020-12-23 07:07:53,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:07:53,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:07:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:07:53,666 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 33 states. [2020-12-23 07:07:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:54,414 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-23 07:07:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:07:54,415 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-12-23 07:07:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:54,415 INFO L225 Difference]: With dead ends: 95 [2020-12-23 07:07:54,416 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 07:07:54,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 07:07:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 07:07:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-12-23 07:07:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 07:07:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-12-23 07:07:54,426 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2020-12-23 07:07:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:54,426 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-12-23 07:07:54,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:07:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-12-23 07:07:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 07:07:54,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:54,427 INFO L422 BasicCegarLoop]: trace histogram [25, 23, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:54,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:54,641 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash -641498803, now seen corresponding path program 22 times [2020-12-23 07:07:54,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:54,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612207030] [2020-12-23 07:07:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612207030] [2020-12-23 07:07:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926546895] [2020-12-23 07:07:55,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:55,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:07:55,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:07:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:55,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:55,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 07:07:55,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069381096] [2020-12-23 07:07:55,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 07:07:55,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:55,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 07:07:55,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:55,224 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 27 states. [2020-12-23 07:07:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:55,350 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-12-23 07:07:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:07:55,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-12-23 07:07:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:55,351 INFO L225 Difference]: With dead ends: 92 [2020-12-23 07:07:55,351 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 07:07:55,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:07:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 07:07:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-23 07:07:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:07:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-12-23 07:07:55,358 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-12-23 07:07:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:55,358 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-12-23 07:07:55,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 07:07:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-12-23 07:07:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 07:07:55,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:55,359 INFO L422 BasicCegarLoop]: trace histogram [26, 24, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:55,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:07:55,574 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash -601238864, now seen corresponding path program 23 times [2020-12-23 07:07:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208844760] [2020-12-23 07:07:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208844760] [2020-12-23 07:07:56,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241410483] [2020-12-23 07:07:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:56,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 07:07:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:56,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:07:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:56,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:56,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 07:07:56,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283157805] [2020-12-23 07:07:56,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 07:07:56,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:56,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 07:07:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:56,187 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 28 states. [2020-12-23 07:07:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:56,336 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-12-23 07:07:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:07:56,337 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-12-23 07:07:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:56,338 INFO L225 Difference]: With dead ends: 94 [2020-12-23 07:07:56,338 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:07:56,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 07:07:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:07:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-23 07:07:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 07:07:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-12-23 07:07:56,342 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-12-23 07:07:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:56,343 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-12-23 07:07:56,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 07:07:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-12-23 07:07:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 07:07:56,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:56,344 INFO L422 BasicCegarLoop]: trace histogram [27, 25, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:56,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:56,558 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -566143149, now seen corresponding path program 24 times [2020-12-23 07:07:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:56,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341513241] [2020-12-23 07:07:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 07:07:57,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341513241] [2020-12-23 07:07:57,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329267664] [2020-12-23 07:07:57,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:57,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 07:07:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:07:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:07:57,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 79 proven. 28 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-23 07:07:57,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:57,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2020-12-23 07:07:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686318538] [2020-12-23 07:07:57,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:07:57,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:57,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:07:57,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:07:57,347 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 37 states. [2020-12-23 07:07:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:58,089 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2020-12-23 07:07:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 07:07:58,090 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2020-12-23 07:07:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:58,091 INFO L225 Difference]: With dead ends: 103 [2020-12-23 07:07:58,091 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 07:07:58,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1342, Invalid=2564, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:07:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 07:07:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-12-23 07:07:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 07:07:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-12-23 07:07:58,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 68 [2020-12-23 07:07:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:58,100 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-12-23 07:07:58,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:07:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-12-23 07:07:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 07:07:58,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:58,101 INFO L422 BasicCegarLoop]: trace histogram [28, 26, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:58,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:07:58,315 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1490489590, now seen corresponding path program 25 times [2020-12-23 07:07:58,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:58,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276734572] [2020-12-23 07:07:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276734572] [2020-12-23 07:07:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769698094] [2020-12-23 07:07:58,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:07:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:07:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:59,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:07:59,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 07:07:59,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470889785] [2020-12-23 07:07:59,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 07:07:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:07:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 07:07:59,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:59,004 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 30 states. [2020-12-23 07:07:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:07:59,181 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-12-23 07:07:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 07:07:59,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2020-12-23 07:07:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:07:59,182 INFO L225 Difference]: With dead ends: 100 [2020-12-23 07:07:59,182 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 07:07:59,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:07:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 07:07:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-23 07:07:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 07:07:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-12-23 07:07:59,189 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2020-12-23 07:07:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:07:59,189 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-12-23 07:07:59,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 07:07:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-12-23 07:07:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 07:07:59,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:07:59,190 INFO L422 BasicCegarLoop]: trace histogram [29, 27, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:07:59,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:07:59,404 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:07:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:07:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1660418611, now seen corresponding path program 26 times [2020-12-23 07:07:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:07:59,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405987330] [2020-12-23 07:07:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:07:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:07:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:07:59,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405987330] [2020-12-23 07:07:59,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139724615] [2020-12-23 07:07:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:00,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:08:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:00,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 07:08:00,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295655046] [2020-12-23 07:08:00,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 07:08:00,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 07:08:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:00,123 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 31 states. [2020-12-23 07:08:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:00,271 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-12-23 07:08:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 07:08:00,272 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-12-23 07:08:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:00,272 INFO L225 Difference]: With dead ends: 102 [2020-12-23 07:08:00,273 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 07:08:00,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 07:08:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 07:08:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-23 07:08:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:08:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-12-23 07:08:00,280 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2020-12-23 07:08:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:00,280 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-12-23 07:08:00,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 07:08:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-12-23 07:08:00,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 07:08:00,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:00,281 INFO L422 BasicCegarLoop]: trace histogram [30, 28, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:00,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 07:08:00,495 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1753450544, now seen corresponding path program 27 times [2020-12-23 07:08:00,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:00,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379315278] [2020-12-23 07:08:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 07:08:01,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379315278] [2020-12-23 07:08:01,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365367854] [2020-12-23 07:08:01,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:01,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 07:08:01,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 07:08:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 88 proven. 36 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-12-23 07:08:01,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:01,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2020-12-23 07:08:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361105347] [2020-12-23 07:08:01,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 07:08:01,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 07:08:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1110, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 07:08:01,453 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 41 states. [2020-12-23 07:08:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:02,458 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-12-23 07:08:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:02,459 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-12-23 07:08:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:02,460 INFO L225 Difference]: With dead ends: 111 [2020-12-23 07:08:02,460 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:08:02,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1661, Invalid=3169, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:08:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:08:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-12-23 07:08:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 07:08:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-12-23 07:08:02,473 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2020-12-23 07:08:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:02,473 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-12-23 07:08:02,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 07:08:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-12-23 07:08:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 07:08:02,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:02,474 INFO L422 BasicCegarLoop]: trace histogram [31, 29, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:02,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:02,689 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash -215532513, now seen corresponding path program 28 times [2020-12-23 07:08:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:02,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537800044] [2020-12-23 07:08:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:03,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537800044] [2020-12-23 07:08:03,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796130106] [2020-12-23 07:08:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:03,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 07:08:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:03,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:03,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 07:08:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512419789] [2020-12-23 07:08:03,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 07:08:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 07:08:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:03,546 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 33 states. [2020-12-23 07:08:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:03,716 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-23 07:08:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 07:08:03,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2020-12-23 07:08:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:03,717 INFO L225 Difference]: With dead ends: 108 [2020-12-23 07:08:03,717 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 07:08:03,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:08:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 07:08:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 07:08:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 07:08:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-12-23 07:08:03,726 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-12-23 07:08:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-12-23 07:08:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 07:08:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-12-23 07:08:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 07:08:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:03,727 INFO L422 BasicCegarLoop]: trace histogram [32, 30, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:03,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 07:08:03,943 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -142220222, now seen corresponding path program 29 times [2020-12-23 07:08:03,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:03,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101351166] [2020-12-23 07:08:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101351166] [2020-12-23 07:08:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086837200] [2020-12-23 07:08:04,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:04,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-23 07:08:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:04,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:08:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:04,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:04,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 07:08:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346685786] [2020-12-23 07:08:04,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 07:08:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 07:08:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:08:04,808 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 34 states. [2020-12-23 07:08:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:04,922 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2020-12-23 07:08:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 07:08:04,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 80 [2020-12-23 07:08:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:04,923 INFO L225 Difference]: With dead ends: 110 [2020-12-23 07:08:04,923 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 07:08:04,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 07:08:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 07:08:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 07:08:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 07:08:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-12-23 07:08:04,930 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-12-23 07:08:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:04,931 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-12-23 07:08:04,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 07:08:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-12-23 07:08:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 07:08:04,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:04,932 INFO L422 BasicCegarLoop]: trace histogram [33, 31, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:05,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:05,145 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1591414693, now seen corresponding path program 30 times [2020-12-23 07:08:05,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:05,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903191994] [2020-12-23 07:08:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 07:08:05,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903191994] [2020-12-23 07:08:05,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741936347] [2020-12-23 07:08:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:05,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:08:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:08:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-12-23 07:08:06,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:06,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2020-12-23 07:08:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462689922] [2020-12-23 07:08:06,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:06,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:06,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=1342, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:06,296 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 45 states. [2020-12-23 07:08:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:07,523 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-12-23 07:08:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:07,523 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 82 [2020-12-23 07:08:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:07,524 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:08:07,524 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 07:08:07,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2014, Invalid=3838, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 07:08:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 07:08:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 07:08:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 07:08:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-12-23 07:08:07,531 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 82 [2020-12-23 07:08:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:07,532 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-12-23 07:08:07,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-12-23 07:08:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 07:08:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:07,533 INFO L422 BasicCegarLoop]: trace histogram [34, 32, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:07,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 07:08:07,750 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:07,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1826898980, now seen corresponding path program 31 times [2020-12-23 07:08:07,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:07,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973417227] [2020-12-23 07:08:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:08,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973417227] [2020-12-23 07:08:08,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827596624] [2020-12-23 07:08:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:08,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:08:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1211 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:08,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:08,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 07:08:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963932841] [2020-12-23 07:08:08,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 07:08:08,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 07:08:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:08,698 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 36 states. [2020-12-23 07:08:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:08,880 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-12-23 07:08:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 07:08:08,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2020-12-23 07:08:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:08,881 INFO L225 Difference]: With dead ends: 116 [2020-12-23 07:08:08,881 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 07:08:08,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 07:08:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 07:08:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 07:08:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 07:08:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-12-23 07:08:08,888 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2020-12-23 07:08:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:08,888 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-12-23 07:08:08,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 07:08:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-12-23 07:08:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 07:08:08,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:08,889 INFO L422 BasicCegarLoop]: trace histogram [35, 33, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:09,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 07:08:09,105 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1543618209, now seen corresponding path program 32 times [2020-12-23 07:08:09,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:09,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307996227] [2020-12-23 07:08:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307996227] [2020-12-23 07:08:09,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119537702] [2020-12-23 07:08:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:09,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 07:08:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:10,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:10,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 07:08:10,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583780671] [2020-12-23 07:08:10,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 07:08:10,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 07:08:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:10,090 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 37 states. [2020-12-23 07:08:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:10,268 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2020-12-23 07:08:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 07:08:10,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 87 [2020-12-23 07:08:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:10,269 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:08:10,270 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 07:08:10,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 07:08:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 07:08:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 07:08:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 07:08:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-12-23 07:08:10,278 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2020-12-23 07:08:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:10,278 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-12-23 07:08:10,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 07:08:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-12-23 07:08:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 07:08:10,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:10,279 INFO L422 BasicCegarLoop]: trace histogram [36, 34, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:10,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 07:08:10,484 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -106263074, now seen corresponding path program 33 times [2020-12-23 07:08:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:10,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300571326] [2020-12-23 07:08:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-23 07:08:11,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300571326] [2020-12-23 07:08:11,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755346702] [2020-12-23 07:08:11,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:11,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 07:08:11,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:08:11,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 170 proven. 4 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-12-23 07:08:11,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:11,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 5] total 40 [2020-12-23 07:08:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127832124] [2020-12-23 07:08:11,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:08:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:08:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:11,612 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 40 states. [2020-12-23 07:08:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:11,831 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2020-12-23 07:08:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 07:08:11,832 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-12-23 07:08:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:11,833 INFO L225 Difference]: With dead ends: 123 [2020-12-23 07:08:11,833 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:08:11,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:08:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-23 07:08:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:08:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-12-23 07:08:11,842 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2020-12-23 07:08:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:11,842 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-12-23 07:08:11,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:08:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-12-23 07:08:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 07:08:11,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:11,843 INFO L422 BasicCegarLoop]: trace histogram [38, 35, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:12,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 07:08:12,044 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1851451562, now seen corresponding path program 34 times [2020-12-23 07:08:12,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:12,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870022938] [2020-12-23 07:08:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870022938] [2020-12-23 07:08:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543311209] [2020-12-23 07:08:12,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:13,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:08:13,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1499 backedges. 180 proven. 1260 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:13,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:13,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 07:08:13,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912782505] [2020-12-23 07:08:13,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 07:08:13,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 07:08:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:13,138 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 39 states. [2020-12-23 07:08:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:13,346 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2020-12-23 07:08:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 07:08:13,347 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 93 [2020-12-23 07:08:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:13,348 INFO L225 Difference]: With dead ends: 126 [2020-12-23 07:08:13,348 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 07:08:13,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:08:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 07:08:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-23 07:08:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 07:08:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 07:08:13,356 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 93 [2020-12-23 07:08:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:13,356 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 07:08:13,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 07:08:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 07:08:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 07:08:13,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:13,357 INFO L422 BasicCegarLoop]: trace histogram [39, 36, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:13,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 07:08:13,573 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 370328787, now seen corresponding path program 35 times [2020-12-23 07:08:13,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:13,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086408991] [2020-12-23 07:08:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086408991] [2020-12-23 07:08:14,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735007665] [2020-12-23 07:08:14,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:14,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 07:08:14,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:14,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:08:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 185 proven. 1332 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:14,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:14,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 07:08:14,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505227461] [2020-12-23 07:08:14,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 07:08:14,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:14,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 07:08:14,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:14,749 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 40 states. [2020-12-23 07:08:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:14,984 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-12-23 07:08:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 07:08:14,984 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 95 [2020-12-23 07:08:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:14,985 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:08:14,985 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 07:08:14,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 07:08:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 07:08:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-23 07:08:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:08:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 07:08:14,994 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2020-12-23 07:08:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:14,994 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 07:08:14,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 07:08:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 07:08:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 07:08:14,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:14,995 INFO L422 BasicCegarLoop]: trace histogram [40, 37, 10, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:15,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 07:08:15,209 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash 902498064, now seen corresponding path program 36 times [2020-12-23 07:08:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:15,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958539153] [2020-12-23 07:08:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 07:08:16,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958539153] [2020-12-23 07:08:16,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243380210] [2020-12-23 07:08:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:16,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 07:08:16,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:08:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 194 proven. 55 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-12-23 07:08:16,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:16,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 15] total 53 [2020-12-23 07:08:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667743921] [2020-12-23 07:08:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 07:08:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 07:08:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=1872, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:08:16,812 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 53 states. [2020-12-23 07:08:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:18,542 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2020-12-23 07:08:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:18,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 97 [2020-12-23 07:08:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:18,544 INFO L225 Difference]: With dead ends: 143 [2020-12-23 07:08:18,544 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 07:08:18,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2784, Invalid=5406, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 07:08:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 07:08:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-12-23 07:08:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 07:08:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-12-23 07:08:18,554 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 97 [2020-12-23 07:08:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:18,555 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-12-23 07:08:18,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 07:08:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-12-23 07:08:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 07:08:18,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:18,556 INFO L422 BasicCegarLoop]: trace histogram [41, 38, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:18,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 07:08:18,770 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -955024129, now seen corresponding path program 37 times [2020-12-23 07:08:18,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:18,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495191937] [2020-12-23 07:08:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:19,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495191937] [2020-12-23 07:08:19,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882747120] [2020-12-23 07:08:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 07:08:19,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 195 proven. 1482 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:20,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:20,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 07:08:20,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963737509] [2020-12-23 07:08:20,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 07:08:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 07:08:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:20,075 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 42 states. [2020-12-23 07:08:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:20,320 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-12-23 07:08:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 07:08:20,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 100 [2020-12-23 07:08:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:20,322 INFO L225 Difference]: With dead ends: 134 [2020-12-23 07:08:20,322 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:08:20,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 07:08:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:08:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-23 07:08:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:08:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-12-23 07:08:20,329 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 100 [2020-12-23 07:08:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:20,329 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-12-23 07:08:20,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 07:08:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-12-23 07:08:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 07:08:20,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:20,330 INFO L422 BasicCegarLoop]: trace histogram [42, 39, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:20,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:20,532 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1035200286, now seen corresponding path program 38 times [2020-12-23 07:08:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:20,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948185702] [2020-12-23 07:08:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:21,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948185702] [2020-12-23 07:08:21,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275667750] [2020-12-23 07:08:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:21,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:08:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 200 proven. 1560 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:21,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 07:08:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333246176] [2020-12-23 07:08:21,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 07:08:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 07:08:21,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:21,826 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 43 states. [2020-12-23 07:08:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:21,997 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2020-12-23 07:08:21,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 07:08:21,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2020-12-23 07:08:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:21,999 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:08:21,999 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:08:21,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 07:08:21,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:08:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-23 07:08:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:08:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-12-23 07:08:22,007 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 102 [2020-12-23 07:08:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:22,007 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-12-23 07:08:22,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 07:08:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-12-23 07:08:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 07:08:22,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:22,008 INFO L422 BasicCegarLoop]: trace histogram [43, 40, 11, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:22,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:22,222 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:22,223 INFO L82 PathProgramCache]: Analyzing trace with hash -775075835, now seen corresponding path program 39 times [2020-12-23 07:08:22,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:22,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894121326] [2020-12-23 07:08:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 205 proven. 1640 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 07:08:23,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894121326] [2020-12-23 07:08:23,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821504297] [2020-12-23 07:08:23,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:23,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 07:08:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:23,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:08:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1915 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-23 07:08:24,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16] total 57 [2020-12-23 07:08:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487787795] [2020-12-23 07:08:24,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:08:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:08:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=2170, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:08:24,017 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 57 states. [2020-12-23 07:08:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:25,944 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-23 07:08:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:08:25,944 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 104 [2020-12-23 07:08:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:25,949 INFO L225 Difference]: With dead ends: 151 [2020-12-23 07:08:25,949 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 07:08:25,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3236, Invalid=6270, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 07:08:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 07:08:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2020-12-23 07:08:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:08:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 07:08:25,960 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 104 [2020-12-23 07:08:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:25,960 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 07:08:25,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:08:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 07:08:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 07:08:25,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:25,961 INFO L422 BasicCegarLoop]: trace histogram [44, 41, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:26,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:26,177 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1304331260, now seen corresponding path program 40 times [2020-12-23 07:08:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89871934] [2020-12-23 07:08:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89871934] [2020-12-23 07:08:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564891626] [2020-12-23 07:08:27,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:27,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:27,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:08:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 210 proven. 1722 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:27,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:27,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 07:08:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801606694] [2020-12-23 07:08:27,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 07:08:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 07:08:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:27,609 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 45 states. [2020-12-23 07:08:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:27,878 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2020-12-23 07:08:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:08:27,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2020-12-23 07:08:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:27,880 INFO L225 Difference]: With dead ends: 142 [2020-12-23 07:08:27,880 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 07:08:27,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 07:08:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 07:08:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-23 07:08:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-23 07:08:27,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-12-23 07:08:27,890 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 107 [2020-12-23 07:08:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:27,890 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-12-23 07:08:27,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 07:08:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-12-23 07:08:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 07:08:27,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:27,891 INFO L422 BasicCegarLoop]: trace histogram [45, 42, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:28,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 07:08:28,105 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1696642367, now seen corresponding path program 41 times [2020-12-23 07:08:28,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:28,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997995409] [2020-12-23 07:08:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:29,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997995409] [2020-12-23 07:08:29,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156663369] [2020-12-23 07:08:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:29,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-23 07:08:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 07:08:29,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2103 backedges. 215 proven. 1806 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:29,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:29,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 07:08:29,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15516486] [2020-12-23 07:08:29,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 07:08:29,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 07:08:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:29,644 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 46 states. [2020-12-23 07:08:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:29,927 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2020-12-23 07:08:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 07:08:29,928 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 109 [2020-12-23 07:08:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:29,929 INFO L225 Difference]: With dead ends: 144 [2020-12-23 07:08:29,929 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 07:08:29,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 07:08:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 07:08:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-23 07:08:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 07:08:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-12-23 07:08:29,938 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2020-12-23 07:08:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:29,939 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-12-23 07:08:29,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 07:08:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-12-23 07:08:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 07:08:29,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:29,940 INFO L422 BasicCegarLoop]: trace histogram [46, 43, 12, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:30,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:30,155 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -750494146, now seen corresponding path program 42 times [2020-12-23 07:08:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242440882] [2020-12-23 07:08:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 220 proven. 1892 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-23 07:08:31,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242440882] [2020-12-23 07:08:31,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171109193] [2020-12-23 07:08:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:31,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 07:08:31,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:08:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2194 backedges. 224 proven. 78 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-12-23 07:08:32,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:32,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 17] total 61 [2020-12-23 07:08:32,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511559528] [2020-12-23 07:08:32,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:08:32,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:08:32,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=2490, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:08:32,232 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 61 states. [2020-12-23 07:08:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:34,026 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-12-23 07:08:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 07:08:34,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 111 [2020-12-23 07:08:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:34,028 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:08:34,028 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 07:08:34,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3722, Invalid=7198, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 07:08:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 07:08:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2020-12-23 07:08:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 07:08:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2020-12-23 07:08:34,038 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 111 [2020-12-23 07:08:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:34,039 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2020-12-23 07:08:34,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:08:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2020-12-23 07:08:34,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 07:08:34,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:34,040 INFO L422 BasicCegarLoop]: trace histogram [47, 44, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:34,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:34,255 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1337438801, now seen corresponding path program 43 times [2020-12-23 07:08:34,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:34,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834869439] [2020-12-23 07:08:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:35,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834869439] [2020-12-23 07:08:35,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270498686] [2020-12-23 07:08:35,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 07:08:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 225 proven. 1980 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:35,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:35,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 07:08:35,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976723822] [2020-12-23 07:08:35,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 07:08:35,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 07:08:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:35,773 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 48 states. [2020-12-23 07:08:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:36,022 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-12-23 07:08:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 07:08:36,023 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2020-12-23 07:08:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:36,024 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:08:36,024 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 07:08:36,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 07:08:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 07:08:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-23 07:08:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 07:08:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2020-12-23 07:08:36,033 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 114 [2020-12-23 07:08:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:36,033 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2020-12-23 07:08:36,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 07:08:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2020-12-23 07:08:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 07:08:36,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:36,034 INFO L422 BasicCegarLoop]: trace histogram [48, 45, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:36,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 07:08:36,247 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -808172300, now seen corresponding path program 44 times [2020-12-23 07:08:36,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:36,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069617747] [2020-12-23 07:08:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:37,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069617747] [2020-12-23 07:08:37,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115550764] [2020-12-23 07:08:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:37,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:08:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 230 proven. 2070 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:37,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:37,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 07:08:37,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134603497] [2020-12-23 07:08:37,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 07:08:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:37,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 07:08:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:37,818 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 49 states. [2020-12-23 07:08:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:38,057 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-12-23 07:08:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 07:08:38,058 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 116 [2020-12-23 07:08:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:38,059 INFO L225 Difference]: With dead ends: 152 [2020-12-23 07:08:38,059 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:08:38,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 07:08:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:08:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-12-23 07:08:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 07:08:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-12-23 07:08:38,069 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 116 [2020-12-23 07:08:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:38,070 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-12-23 07:08:38,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 07:08:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-12-23 07:08:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 07:08:38,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:38,071 INFO L422 BasicCegarLoop]: trace histogram [49, 46, 13, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:38,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 07:08:38,284 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1156138281, now seen corresponding path program 45 times [2020-12-23 07:08:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:38,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620309605] [2020-12-23 07:08:38,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 235 proven. 2162 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-23 07:08:39,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620309605] [2020-12-23 07:08:39,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614748132] [2020-12-23 07:08:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:39,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:08:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:08:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2492 backedges. 239 proven. 91 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2020-12-23 07:08:40,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:40,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18] total 65 [2020-12-23 07:08:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342316598] [2020-12-23 07:08:40,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 07:08:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 07:08:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=2832, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 07:08:40,579 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 65 states. [2020-12-23 07:08:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:43,134 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2020-12-23 07:08:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:08:43,135 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 118 [2020-12-23 07:08:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:43,136 INFO L225 Difference]: With dead ends: 167 [2020-12-23 07:08:43,136 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 07:08:43,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4242, Invalid=8190, Unknown=0, NotChecked=0, Total=12432 [2020-12-23 07:08:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 07:08:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 126. [2020-12-23 07:08:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 07:08:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-12-23 07:08:43,147 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 118 [2020-12-23 07:08:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:43,147 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-12-23 07:08:43,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 07:08:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-12-23 07:08:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 07:08:43,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:43,148 INFO L422 BasicCegarLoop]: trace histogram [50, 47, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:43,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 07:08:43,349 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash 317629618, now seen corresponding path program 46 times [2020-12-23 07:08:43,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:43,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473656122] [2020-12-23 07:08:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:44,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473656122] [2020-12-23 07:08:44,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261160686] [2020-12-23 07:08:44,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:45,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:08:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:08:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2605 backedges. 240 proven. 2256 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:45,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:45,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 07:08:45,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016155202] [2020-12-23 07:08:45,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 07:08:45,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:45,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 07:08:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:45,249 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 51 states. [2020-12-23 07:08:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:45,567 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2020-12-23 07:08:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 07:08:45,568 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 121 [2020-12-23 07:08:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:45,569 INFO L225 Difference]: With dead ends: 158 [2020-12-23 07:08:45,569 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 07:08:45,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 07:08:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 07:08:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-12-23 07:08:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 07:08:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 07:08:45,580 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2020-12-23 07:08:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:45,580 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 07:08:45,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 07:08:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 07:08:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-23 07:08:45,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:45,581 INFO L422 BasicCegarLoop]: trace histogram [51, 48, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:45,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:45,796 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash 189359279, now seen corresponding path program 47 times [2020-12-23 07:08:45,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:45,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140113511] [2020-12-23 07:08:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:47,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140113511] [2020-12-23 07:08:47,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57084158] [2020-12-23 07:08:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:47,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2020-12-23 07:08:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 07:08:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 245 proven. 2352 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:47,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:47,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 07:08:47,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760658798] [2020-12-23 07:08:47,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 07:08:47,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 07:08:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:47,750 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 52 states. [2020-12-23 07:08:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:48,028 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2020-12-23 07:08:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 07:08:48,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2020-12-23 07:08:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:48,030 INFO L225 Difference]: With dead ends: 160 [2020-12-23 07:08:48,030 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 07:08:48,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 07:08:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 07:08:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-12-23 07:08:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 07:08:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 07:08:48,037 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 123 [2020-12-23 07:08:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:48,037 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 07:08:48,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 07:08:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 07:08:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 07:08:48,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:48,038 INFO L422 BasicCegarLoop]: trace histogram [52, 49, 14, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:48,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:48,252 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1475615084, now seen corresponding path program 48 times [2020-12-23 07:08:48,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:48,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732814256] [2020-12-23 07:08:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 250 proven. 2450 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-23 07:08:50,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732814256] [2020-12-23 07:08:50,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207202072] [2020-12-23 07:08:50,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:50,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 07:08:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:08:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 254 proven. 105 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-12-23 07:08:51,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:51,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 19] total 69 [2020-12-23 07:08:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239206282] [2020-12-23 07:08:51,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:08:51,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:08:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=3196, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:08:51,074 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 69 states. [2020-12-23 07:08:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:53,882 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2020-12-23 07:08:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:08:53,883 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 125 [2020-12-23 07:08:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:53,884 INFO L225 Difference]: With dead ends: 175 [2020-12-23 07:08:53,884 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 07:08:53,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4796, Invalid=9246, Unknown=0, NotChecked=0, Total=14042 [2020-12-23 07:08:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 07:08:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2020-12-23 07:08:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 07:08:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2020-12-23 07:08:53,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 125 [2020-12-23 07:08:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:53,896 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2020-12-23 07:08:53,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:08:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2020-12-23 07:08:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 07:08:53,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:53,897 INFO L422 BasicCegarLoop]: trace histogram [53, 50, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:54,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 07:08:54,113 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1944531875, now seen corresponding path program 49 times [2020-12-23 07:08:54,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:54,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705038119] [2020-12-23 07:08:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705038119] [2020-12-23 07:08:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348811438] [2020-12-23 07:08:55,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 07:08:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 255 proven. 2550 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:56,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:56,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 07:08:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002960856] [2020-12-23 07:08:56,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 07:08:56,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 07:08:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:56,084 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand 54 states. [2020-12-23 07:08:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:56,357 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-12-23 07:08:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 07:08:56,357 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2020-12-23 07:08:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:56,359 INFO L225 Difference]: With dead ends: 166 [2020-12-23 07:08:56,359 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 07:08:56,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 07:08:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 07:08:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-12-23 07:08:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 07:08:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-12-23 07:08:56,369 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 128 [2020-12-23 07:08:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:56,369 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-12-23 07:08:56,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 07:08:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-12-23 07:08:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 07:08:56,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:56,371 INFO L422 BasicCegarLoop]: trace histogram [54, 51, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:56,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:56,586 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:56,586 INFO L82 PathProgramCache]: Analyzing trace with hash -330240762, now seen corresponding path program 50 times [2020-12-23 07:08:56,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:56,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228741900] [2020-12-23 07:08:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:08:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:58,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228741900] [2020-12-23 07:08:58,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109005778] [2020-12-23 07:08:58,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:08:58,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:08:58,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:08:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 07:08:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:08:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 260 proven. 2652 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:08:58,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:08:58,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 07:08:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998305004] [2020-12-23 07:08:58,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 07:08:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:08:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 07:08:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:08:58,683 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 55 states. [2020-12-23 07:08:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:08:59,053 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2020-12-23 07:08:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 07:08:59,053 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 130 [2020-12-23 07:08:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:08:59,054 INFO L225 Difference]: With dead ends: 168 [2020-12-23 07:08:59,054 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 07:08:59,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 07:08:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 07:08:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-23 07:08:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 07:08:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2020-12-23 07:08:59,066 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 130 [2020-12-23 07:08:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:08:59,066 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2020-12-23 07:08:59,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 07:08:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2020-12-23 07:08:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 07:08:59,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:08:59,068 INFO L422 BasicCegarLoop]: trace histogram [55, 52, 15, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:08:59,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 07:08:59,282 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:08:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:08:59,283 INFO L82 PathProgramCache]: Analyzing trace with hash -248391255, now seen corresponding path program 51 times [2020-12-23 07:08:59,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:08:59,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052310027] [2020-12-23 07:08:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:08:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 265 proven. 2756 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-23 07:09:01,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052310027] [2020-12-23 07:09:01,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395686475] [2020-12-23 07:09:01,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:01,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 07:09:01,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:01,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 07:09:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3145 backedges. 364 proven. 9 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2020-12-23 07:09:01,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:01,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6] total 59 [2020-12-23 07:09:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690759395] [2020-12-23 07:09:01,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 07:09:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 07:09:01,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:09:01,818 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand 59 states. [2020-12-23 07:09:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:02,108 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2020-12-23 07:09:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:09:02,109 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2020-12-23 07:09:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:02,111 INFO L225 Difference]: With dead ends: 173 [2020-12-23 07:09:02,111 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 07:09:02,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 07:09:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 07:09:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-23 07:09:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 07:09:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-12-23 07:09:02,119 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 132 [2020-12-23 07:09:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:02,119 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-12-23 07:09:02,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 07:09:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-12-23 07:09:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 07:09:02,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:02,120 INFO L422 BasicCegarLoop]: trace histogram [57, 53, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:02,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 07:09:02,321 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1336946225, now seen corresponding path program 52 times [2020-12-23 07:09:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048594156] [2020-12-23 07:09:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048594156] [2020-12-23 07:09:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722020916] [2020-12-23 07:09:04,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:04,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 07:09:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 378 proven. 2862 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:04,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:04,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 07:09:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574212975] [2020-12-23 07:09:04,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 07:09:04,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:04,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 07:09:04,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:04,630 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 57 states. [2020-12-23 07:09:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:04,989 INFO L93 Difference]: Finished difference Result 176 states and 187 transitions. [2020-12-23 07:09:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 07:09:04,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 136 [2020-12-23 07:09:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:04,992 INFO L225 Difference]: With dead ends: 176 [2020-12-23 07:09:04,992 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 07:09:04,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 07:09:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 07:09:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-12-23 07:09:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 07:09:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-12-23 07:09:05,002 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 136 [2020-12-23 07:09:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:05,002 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-12-23 07:09:05,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 07:09:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-12-23 07:09:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 07:09:05,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:05,003 INFO L422 BasicCegarLoop]: trace histogram [58, 54, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:05,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 07:09:05,216 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 432526484, now seen corresponding path program 53 times [2020-12-23 07:09:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:05,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362448795] [2020-12-23 07:09:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362448795] [2020-12-23 07:09:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626335156] [2020-12-23 07:09:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:07,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2020-12-23 07:09:07,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 07:09:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 385 proven. 2970 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:07,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:07,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 07:09:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869621132] [2020-12-23 07:09:07,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 07:09:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 07:09:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:07,596 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 58 states. [2020-12-23 07:09:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:07,987 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-12-23 07:09:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 07:09:07,988 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2020-12-23 07:09:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:07,989 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:09:07,989 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 07:09:07,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 07:09:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 07:09:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-23 07:09:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 07:09:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 150 transitions. [2020-12-23 07:09:08,001 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 150 transitions. Word has length 138 [2020-12-23 07:09:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:08,001 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 150 transitions. [2020-12-23 07:09:08,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 07:09:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 150 transitions. [2020-12-23 07:09:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 07:09:08,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:08,002 INFO L422 BasicCegarLoop]: trace histogram [59, 55, 15, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:08,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 07:09:08,217 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1131450825, now seen corresponding path program 54 times [2020-12-23 07:09:08,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:08,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920440088] [2020-12-23 07:09:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 392 proven. 3080 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-12-23 07:09:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920440088] [2020-12-23 07:09:10,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922933349] [2020-12-23 07:09:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:10,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 07:09:10,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:09:10,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 401 proven. 120 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2020-12-23 07:09:11,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:11,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 20] total 76 [2020-12-23 07:09:11,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72096836] [2020-12-23 07:09:11,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 07:09:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:11,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 07:09:11,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=3858, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:09:11,472 INFO L87 Difference]: Start difference. First operand 145 states and 150 transitions. Second operand 76 states. [2020-12-23 07:09:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:15,014 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2020-12-23 07:09:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 07:09:15,015 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 140 [2020-12-23 07:09:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:15,017 INFO L225 Difference]: With dead ends: 201 [2020-12-23 07:09:15,017 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:09:15,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5874, Invalid=11418, Unknown=0, NotChecked=0, Total=17292 [2020-12-23 07:09:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:09:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2020-12-23 07:09:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 07:09:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-12-23 07:09:15,030 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 140 [2020-12-23 07:09:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:15,030 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-12-23 07:09:15,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 07:09:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-12-23 07:09:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-23 07:09:15,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:15,031 INFO L422 BasicCegarLoop]: trace histogram [60, 56, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:15,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:15,241 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1356357230, now seen corresponding path program 55 times [2020-12-23 07:09:15,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:15,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364626337] [2020-12-23 07:09:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:17,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364626337] [2020-12-23 07:09:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104559103] [2020-12-23 07:09:17,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 07:09:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3736 backedges. 399 proven. 3192 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:17,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:17,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 07:09:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80673947] [2020-12-23 07:09:17,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 07:09:17,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 07:09:17,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:17,821 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 60 states. [2020-12-23 07:09:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:18,154 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2020-12-23 07:09:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 07:09:18,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2020-12-23 07:09:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:18,155 INFO L225 Difference]: With dead ends: 184 [2020-12-23 07:09:18,155 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 07:09:18,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 07:09:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 07:09:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-23 07:09:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 07:09:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-12-23 07:09:18,168 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 143 [2020-12-23 07:09:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:18,169 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-12-23 07:09:18,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 07:09:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-12-23 07:09:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 07:09:18,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:18,170 INFO L422 BasicCegarLoop]: trace histogram [61, 57, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:18,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 07:09:18,371 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:18,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:18,372 INFO L82 PathProgramCache]: Analyzing trace with hash -597846577, now seen corresponding path program 56 times [2020-12-23 07:09:18,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:18,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278957083] [2020-12-23 07:09:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:20,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278957083] [2020-12-23 07:09:20,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244106817] [2020-12-23 07:09:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:20,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 07:09:20,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3857 backedges. 406 proven. 3306 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:21,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:21,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 07:09:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695807929] [2020-12-23 07:09:21,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 07:09:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 07:09:21,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:21,026 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 61 states. [2020-12-23 07:09:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:21,417 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2020-12-23 07:09:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 07:09:21,418 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 145 [2020-12-23 07:09:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:21,419 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:09:21,419 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 07:09:21,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 07:09:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 07:09:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-12-23 07:09:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 07:09:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-12-23 07:09:21,431 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 145 [2020-12-23 07:09:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:21,432 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-12-23 07:09:21,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 07:09:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-12-23 07:09:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-23 07:09:21,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:21,433 INFO L422 BasicCegarLoop]: trace histogram [62, 58, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:21,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:21,648 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1813549364, now seen corresponding path program 57 times [2020-12-23 07:09:21,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:21,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303712709] [2020-12-23 07:09:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 413 proven. 3422 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 07:09:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303712709] [2020-12-23 07:09:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792158570] [2020-12-23 07:09:24,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:24,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 07:09:24,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:09:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 422 proven. 136 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2020-12-23 07:09:25,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:25,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 21] total 80 [2020-12-23 07:09:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707702341] [2020-12-23 07:09:25,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 07:09:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:25,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 07:09:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2039, Invalid=4281, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:09:25,260 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 80 states. [2020-12-23 07:09:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:28,867 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2020-12-23 07:09:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:09:28,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 147 [2020-12-23 07:09:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:28,869 INFO L225 Difference]: With dead ends: 209 [2020-12-23 07:09:28,870 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 07:09:28,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6523, Invalid=12659, Unknown=0, NotChecked=0, Total=19182 [2020-12-23 07:09:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 07:09:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2020-12-23 07:09:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 07:09:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-12-23 07:09:28,881 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 147 [2020-12-23 07:09:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:28,881 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-12-23 07:09:28,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 07:09:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-12-23 07:09:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 07:09:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:28,882 INFO L422 BasicCegarLoop]: trace histogram [63, 59, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:29,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-23 07:09:29,084 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2073689603, now seen corresponding path program 58 times [2020-12-23 07:09:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:29,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225835699] [2020-12-23 07:09:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:31,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225835699] [2020-12-23 07:09:31,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989082349] [2020-12-23 07:09:31,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:31,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:09:31,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:09:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4122 backedges. 420 proven. 3540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:32,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:32,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 07:09:32,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404185030] [2020-12-23 07:09:32,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 07:09:32,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 07:09:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:32,002 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 63 states. [2020-12-23 07:09:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:32,325 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-12-23 07:09:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 07:09:32,326 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 150 [2020-12-23 07:09:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:32,328 INFO L225 Difference]: With dead ends: 192 [2020-12-23 07:09:32,328 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 07:09:32,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 07:09:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 07:09:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-23 07:09:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:09:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 162 transitions. [2020-12-23 07:09:32,349 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 162 transitions. Word has length 150 [2020-12-23 07:09:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:32,349 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 162 transitions. [2020-12-23 07:09:32,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 07:09:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 162 transitions. [2020-12-23 07:09:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 07:09:32,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:32,350 INFO L422 BasicCegarLoop]: trace histogram [64, 60, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:32,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:32,564 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1479621414, now seen corresponding path program 59 times [2020-12-23 07:09:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:32,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717353989] [2020-12-23 07:09:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717353989] [2020-12-23 07:09:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939366166] [2020-12-23 07:09:35,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:35,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2020-12-23 07:09:35,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:09:35,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4249 backedges. 427 proven. 3660 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:35,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:35,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 07:09:35,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612569191] [2020-12-23 07:09:35,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 07:09:35,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 07:09:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:35,560 INFO L87 Difference]: Start difference. First operand 157 states and 162 transitions. Second operand 64 states. [2020-12-23 07:09:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:35,988 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2020-12-23 07:09:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 07:09:35,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 152 [2020-12-23 07:09:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:35,991 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:09:35,991 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 07:09:35,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 07:09:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 07:09:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-12-23 07:09:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 07:09:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 164 transitions. [2020-12-23 07:09:36,003 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 164 transitions. Word has length 152 [2020-12-23 07:09:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:36,003 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 164 transitions. [2020-12-23 07:09:36,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 07:09:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 164 transitions. [2020-12-23 07:09:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 07:09:36,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:36,005 INFO L422 BasicCegarLoop]: trace histogram [65, 61, 17, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:36,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-23 07:09:36,219 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1810742153, now seen corresponding path program 60 times [2020-12-23 07:09:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:36,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115476083] [2020-12-23 07:09:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 434 proven. 3782 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 07:09:38,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115476083] [2020-12-23 07:09:38,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420339181] [2020-12-23 07:09:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:39,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:09:39,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:09:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 549 proven. 16 refuted. 0 times theorem prover too weak. 3813 trivial. 0 not checked. [2020-12-23 07:09:39,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:39,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7] total 69 [2020-12-23 07:09:39,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461523965] [2020-12-23 07:09:39,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:09:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:09:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:39,695 INFO L87 Difference]: Start difference. First operand 159 states and 164 transitions. Second operand 69 states. [2020-12-23 07:09:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:40,215 INFO L93 Difference]: Finished difference Result 199 states and 213 transitions. [2020-12-23 07:09:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:09:40,216 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 154 [2020-12-23 07:09:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:40,217 INFO L225 Difference]: With dead ends: 199 [2020-12-23 07:09:40,217 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 07:09:40,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:09:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 07:09:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-23 07:09:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 07:09:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 169 transitions. [2020-12-23 07:09:40,228 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 169 transitions. Word has length 154 [2020-12-23 07:09:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:40,228 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 169 transitions. [2020-12-23 07:09:40,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:09:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 169 transitions. [2020-12-23 07:09:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 07:09:40,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:40,230 INFO L422 BasicCegarLoop]: trace histogram [67, 62, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:40,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:40,443 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:40,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1823680879, now seen corresponding path program 61 times [2020-12-23 07:09:40,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:40,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472614776] [2020-12-23 07:09:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:43,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472614776] [2020-12-23 07:09:43,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568141410] [2020-12-23 07:09:43,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:43,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 07:09:43,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4642 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:43,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:43,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 07:09:43,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637512418] [2020-12-23 07:09:43,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 07:09:43,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 07:09:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:43,576 INFO L87 Difference]: Start difference. First operand 163 states and 169 transitions. Second operand 66 states. [2020-12-23 07:09:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:44,037 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2020-12-23 07:09:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 07:09:44,038 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2020-12-23 07:09:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:44,039 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:09:44,039 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 07:09:44,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 07:09:44,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 07:09:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-12-23 07:09:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 07:09:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 171 transitions. [2020-12-23 07:09:44,053 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 171 transitions. Word has length 158 [2020-12-23 07:09:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:44,053 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 171 transitions. [2020-12-23 07:09:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 07:09:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 171 transitions. [2020-12-23 07:09:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 07:09:44,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:44,054 INFO L422 BasicCegarLoop]: trace histogram [68, 63, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:44,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 07:09:44,268 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2092056756, now seen corresponding path program 62 times [2020-12-23 07:09:44,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:44,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403448797] [2020-12-23 07:09:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:47,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403448797] [2020-12-23 07:09:47,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700720125] [2020-12-23 07:09:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:47,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:09:47,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 07:09:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 576 proven. 4032 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:47,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:47,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 07:09:47,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767889213] [2020-12-23 07:09:47,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 07:09:47,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 07:09:47,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:47,499 INFO L87 Difference]: Start difference. First operand 165 states and 171 transitions. Second operand 67 states. [2020-12-23 07:09:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:47,793 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-12-23 07:09:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 07:09:47,794 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 160 [2020-12-23 07:09:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:47,796 INFO L225 Difference]: With dead ends: 204 [2020-12-23 07:09:47,796 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 07:09:47,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 07:09:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 07:09:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-12-23 07:09:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:09:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 173 transitions. [2020-12-23 07:09:47,806 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 173 transitions. Word has length 160 [2020-12-23 07:09:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:47,807 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 173 transitions. [2020-12-23 07:09:47,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 07:09:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 173 transitions. [2020-12-23 07:09:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 07:09:47,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:47,808 INFO L422 BasicCegarLoop]: trace histogram [69, 64, 17, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:48,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:48,023 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1570394601, now seen corresponding path program 63 times [2020-12-23 07:09:48,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:48,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561250990] [2020-12-23 07:09:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:09:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 585 proven. 4160 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 07:09:51,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561250990] [2020-12-23 07:09:51,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656593123] [2020-12-23 07:09:51,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:09:51,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 07:09:51,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:09:51,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:09:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:09:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4914 backedges. 601 proven. 153 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2020-12-23 07:09:52,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:09:52,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 23] total 88 [2020-12-23 07:09:52,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289282012] [2020-12-23 07:09:52,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 07:09:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:09:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 07:09:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2463, Invalid=5193, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 07:09:52,292 INFO L87 Difference]: Start difference. First operand 167 states and 173 transitions. Second operand 88 states. [2020-12-23 07:09:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:09:56,930 INFO L93 Difference]: Finished difference Result 237 states and 266 transitions. [2020-12-23 07:09:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 07:09:56,930 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 162 [2020-12-23 07:09:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:09:56,932 INFO L225 Difference]: With dead ends: 237 [2020-12-23 07:09:56,932 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 07:09:56,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=7858, Invalid=15398, Unknown=0, NotChecked=0, Total=23256 [2020-12-23 07:09:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 07:09:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 170. [2020-12-23 07:09:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 07:09:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-12-23 07:09:56,945 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 162 [2020-12-23 07:09:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:09:56,945 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-12-23 07:09:56,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 07:09:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-12-23 07:09:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-23 07:09:56,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:09:56,947 INFO L422 BasicCegarLoop]: trace histogram [70, 65, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:09:57,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-23 07:09:57,161 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:09:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:09:57,161 INFO L82 PathProgramCache]: Analyzing trace with hash -175115790, now seen corresponding path program 64 times [2020-12-23 07:09:57,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:09:57,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485907022] [2020-12-23 07:09:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:09:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485907022] [2020-12-23 07:10:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683982526] [2020-12-23 07:10:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:00,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:10:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 594 proven. 4290 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:00,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:00,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 07:10:00,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540333333] [2020-12-23 07:10:00,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 07:10:00,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 07:10:00,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:00,687 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 69 states. [2020-12-23 07:10:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:01,066 INFO L93 Difference]: Finished difference Result 210 states and 223 transitions. [2020-12-23 07:10:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 07:10:01,067 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 165 [2020-12-23 07:10:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:01,068 INFO L225 Difference]: With dead ends: 210 [2020-12-23 07:10:01,068 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 07:10:01,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 07:10:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 07:10:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-12-23 07:10:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 07:10:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-12-23 07:10:01,083 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 165 [2020-12-23 07:10:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:01,084 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-12-23 07:10:01,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 07:10:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-12-23 07:10:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-23 07:10:01,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:01,085 INFO L422 BasicCegarLoop]: trace histogram [71, 66, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:01,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 07:10:01,298 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 283667055, now seen corresponding path program 65 times [2020-12-23 07:10:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:01,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293487875] [2020-12-23 07:10:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293487875] [2020-12-23 07:10:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859143731] [2020-12-23 07:10:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:04,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 07:10:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 07:10:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5212 backedges. 603 proven. 4422 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:04,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:04,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 07:10:04,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529866001] [2020-12-23 07:10:04,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 07:10:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:04,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 07:10:04,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:04,818 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 70 states. [2020-12-23 07:10:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:05,292 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2020-12-23 07:10:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 07:10:05,293 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 167 [2020-12-23 07:10:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:05,294 INFO L225 Difference]: With dead ends: 212 [2020-12-23 07:10:05,294 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 07:10:05,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 07:10:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 07:10:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-12-23 07:10:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 07:10:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-12-23 07:10:05,310 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 167 [2020-12-23 07:10:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:05,311 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-12-23 07:10:05,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 07:10:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-12-23 07:10:05,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 07:10:05,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:05,312 INFO L422 BasicCegarLoop]: trace histogram [72, 67, 18, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:05,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 07:10:05,527 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1207650388, now seen corresponding path program 66 times [2020-12-23 07:10:05,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:05,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999681836] [2020-12-23 07:10:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 612 proven. 4556 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 07:10:08,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999681836] [2020-12-23 07:10:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812494854] [2020-12-23 07:10:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:08,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 07:10:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:10:08,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 628 proven. 171 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2020-12-23 07:10:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 24] total 92 [2020-12-23 07:10:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665534131] [2020-12-23 07:10:10,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 07:10:10,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 07:10:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2690, Invalid=5682, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 07:10:10,424 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 92 states. [2020-12-23 07:10:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:15,619 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2020-12-23 07:10:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 07:10:15,620 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 169 [2020-12-23 07:10:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:15,621 INFO L225 Difference]: With dead ends: 245 [2020-12-23 07:10:15,621 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 07:10:15,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=8606, Invalid=16834, Unknown=0, NotChecked=0, Total=25440 [2020-12-23 07:10:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 07:10:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 177. [2020-12-23 07:10:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:10:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 183 transitions. [2020-12-23 07:10:15,636 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 183 transitions. Word has length 169 [2020-12-23 07:10:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:15,636 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 183 transitions. [2020-12-23 07:10:15,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 07:10:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 183 transitions. [2020-12-23 07:10:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 07:10:15,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:15,638 INFO L422 BasicCegarLoop]: trace histogram [73, 68, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:15,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:15,849 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash 522974435, now seen corresponding path program 67 times [2020-12-23 07:10:15,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:15,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673244256] [2020-12-23 07:10:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:19,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673244256] [2020-12-23 07:10:19,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284725481] [2020-12-23 07:10:19,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:10:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 621 proven. 4692 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:19,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:19,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 07:10:19,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302555732] [2020-12-23 07:10:19,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 07:10:19,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 07:10:19,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:19,700 INFO L87 Difference]: Start difference. First operand 177 states and 183 transitions. Second operand 72 states. [2020-12-23 07:10:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:20,195 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2020-12-23 07:10:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 07:10:20,195 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 172 [2020-12-23 07:10:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:20,196 INFO L225 Difference]: With dead ends: 218 [2020-12-23 07:10:20,197 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 07:10:20,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 07:10:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 07:10:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-12-23 07:10:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 07:10:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2020-12-23 07:10:20,211 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 172 [2020-12-23 07:10:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:20,212 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2020-12-23 07:10:20,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 07:10:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2020-12-23 07:10:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 07:10:20,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:20,213 INFO L422 BasicCegarLoop]: trace histogram [74, 69, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:20,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:20,425 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:20,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1456432582, now seen corresponding path program 68 times [2020-12-23 07:10:20,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:20,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587056934] [2020-12-23 07:10:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:23,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587056934] [2020-12-23 07:10:23,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919666131] [2020-12-23 07:10:23,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:24,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:10:24,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 07:10:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5666 backedges. 630 proven. 4830 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:24,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:24,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 07:10:24,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154425399] [2020-12-23 07:10:24,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 07:10:24,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 07:10:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:24,387 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand 73 states. [2020-12-23 07:10:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:24,895 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2020-12-23 07:10:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 07:10:24,896 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 174 [2020-12-23 07:10:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:24,897 INFO L225 Difference]: With dead ends: 220 [2020-12-23 07:10:24,897 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 07:10:24,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 07:10:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 07:10:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-12-23 07:10:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:10:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 187 transitions. [2020-12-23 07:10:24,912 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 187 transitions. Word has length 174 [2020-12-23 07:10:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:24,912 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 187 transitions. [2020-12-23 07:10:24,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 07:10:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 187 transitions. [2020-12-23 07:10:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 07:10:24,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:24,914 INFO L422 BasicCegarLoop]: trace histogram [75, 70, 19, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:25,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:25,128 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash 861546985, now seen corresponding path program 69 times [2020-12-23 07:10:25,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:25,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562323335] [2020-12-23 07:10:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 639 proven. 4970 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-23 07:10:28,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562323335] [2020-12-23 07:10:28,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144195526] [2020-12-23 07:10:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:28,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 07:10:28,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:10:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5815 backedges. 655 proven. 190 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2020-12-23 07:10:30,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:30,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 25] total 96 [2020-12-23 07:10:30,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904559978] [2020-12-23 07:10:30,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-23 07:10:30,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:30,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-23 07:10:30,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=6193, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 07:10:30,611 INFO L87 Difference]: Start difference. First operand 181 states and 187 transitions. Second operand 96 states. [2020-12-23 07:10:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:36,380 INFO L93 Difference]: Finished difference Result 253 states and 282 transitions. [2020-12-23 07:10:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-23 07:10:36,381 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 176 [2020-12-23 07:10:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:36,382 INFO L225 Difference]: With dead ends: 253 [2020-12-23 07:10:36,382 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 07:10:36,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9388, Invalid=18334, Unknown=0, NotChecked=0, Total=27722 [2020-12-23 07:10:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 07:10:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2020-12-23 07:10:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 07:10:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-12-23 07:10:36,395 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 176 [2020-12-23 07:10:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:36,395 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-12-23 07:10:36,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-23 07:10:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-12-23 07:10:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-23 07:10:36,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:36,396 INFO L422 BasicCegarLoop]: trace histogram [76, 71, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:36,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-23 07:10:36,597 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:36,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:36,598 INFO L82 PathProgramCache]: Analyzing trace with hash -261938784, now seen corresponding path program 70 times [2020-12-23 07:10:36,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:36,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276331336] [2020-12-23 07:10:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:40,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276331336] [2020-12-23 07:10:40,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30451405] [2020-12-23 07:10:40,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:40,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:10:40,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:10:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 648 proven. 5112 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:40,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 07:10:40,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576174327] [2020-12-23 07:10:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:10:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:10:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:40,803 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 75 states. [2020-12-23 07:10:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:41,349 INFO L93 Difference]: Finished difference Result 226 states and 239 transitions. [2020-12-23 07:10:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:10:41,351 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 179 [2020-12-23 07:10:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:41,352 INFO L225 Difference]: With dead ends: 226 [2020-12-23 07:10:41,352 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 07:10:41,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:10:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 07:10:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-12-23 07:10:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 07:10:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-12-23 07:10:41,369 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 179 [2020-12-23 07:10:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:41,369 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-12-23 07:10:41,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:10:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-12-23 07:10:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 07:10:41,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:41,371 INFO L422 BasicCegarLoop]: trace histogram [77, 72, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:41,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:41,586 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash 195853149, now seen corresponding path program 71 times [2020-12-23 07:10:41,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:41,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655760942] [2020-12-23 07:10:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655760942] [2020-12-23 07:10:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901654330] [2020-12-23 07:10:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:45,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 07:10:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:10:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 657 proven. 5256 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:45,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:45,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 07:10:45,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385813594] [2020-12-23 07:10:45,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 07:10:45,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:45,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 07:10:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:45,968 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 76 states. [2020-12-23 07:10:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:46,522 INFO L93 Difference]: Finished difference Result 228 states and 241 transitions. [2020-12-23 07:10:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 07:10:46,523 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 181 [2020-12-23 07:10:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:46,524 INFO L225 Difference]: With dead ends: 228 [2020-12-23 07:10:46,524 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 07:10:46,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 07:10:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 07:10:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-12-23 07:10:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 07:10:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 194 transitions. [2020-12-23 07:10:46,537 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 194 transitions. Word has length 181 [2020-12-23 07:10:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:46,537 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 194 transitions. [2020-12-23 07:10:46,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 07:10:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 194 transitions. [2020-12-23 07:10:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 07:10:46,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:46,538 INFO L422 BasicCegarLoop]: trace histogram [78, 73, 20, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:46,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:46,739 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2047236570, now seen corresponding path program 72 times [2020-12-23 07:10:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:46,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127386255] [2020-12-23 07:10:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:10:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 666 proven. 5402 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2020-12-23 07:10:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127386255] [2020-12-23 07:10:50,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143934036] [2020-12-23 07:10:50,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:50,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 07:10:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:10:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:10:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:10:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6294 backedges. 682 proven. 210 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2020-12-23 07:10:52,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:10:52,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 26] total 100 [2020-12-23 07:10:52,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692615647] [2020-12-23 07:10:52,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-12-23 07:10:52,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:10:52,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-12-23 07:10:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 07:10:52,761 INFO L87 Difference]: Start difference. First operand 188 states and 194 transitions. Second operand 100 states. [2020-12-23 07:10:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:10:58,233 INFO L93 Difference]: Finished difference Result 261 states and 290 transitions. [2020-12-23 07:10:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 07:10:58,234 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 183 [2020-12-23 07:10:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:10:58,235 INFO L225 Difference]: With dead ends: 261 [2020-12-23 07:10:58,235 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 07:10:58,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=10204, Invalid=19898, Unknown=0, NotChecked=0, Total=30102 [2020-12-23 07:10:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 07:10:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 191. [2020-12-23 07:10:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 07:10:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 197 transitions. [2020-12-23 07:10:58,252 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 197 transitions. Word has length 183 [2020-12-23 07:10:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:10:58,252 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 197 transitions. [2020-12-23 07:10:58,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-12-23 07:10:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 197 transitions. [2020-12-23 07:10:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 07:10:58,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:10:58,254 INFO L422 BasicCegarLoop]: trace histogram [79, 74, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:10:58,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:10:58,467 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:10:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:10:58,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1929936693, now seen corresponding path program 73 times [2020-12-23 07:10:58,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:10:58,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275892184] [2020-12-23 07:10:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:10:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275892184] [2020-12-23 07:11:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623107076] [2020-12-23 07:11:02,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:02,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 07:11:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6472 backedges. 675 proven. 5550 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:03,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 07:11:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040124174] [2020-12-23 07:11:03,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 07:11:03,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 07:11:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:03,083 INFO L87 Difference]: Start difference. First operand 191 states and 197 transitions. Second operand 78 states. [2020-12-23 07:11:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:03,519 INFO L93 Difference]: Finished difference Result 234 states and 247 transitions. [2020-12-23 07:11:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 07:11:03,520 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 186 [2020-12-23 07:11:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:03,522 INFO L225 Difference]: With dead ends: 234 [2020-12-23 07:11:03,522 INFO L226 Difference]: Without dead ends: 193 [2020-12-23 07:11:03,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 07:11:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-23 07:11:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-12-23 07:11:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 07:11:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 199 transitions. [2020-12-23 07:11:03,533 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 199 transitions. Word has length 186 [2020-12-23 07:11:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:03,533 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 199 transitions. [2020-12-23 07:11:03,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 07:11:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 199 transitions. [2020-12-23 07:11:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 07:11:03,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:03,534 INFO L422 BasicCegarLoop]: trace histogram [80, 75, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:03,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 07:11:03,739 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1116264744, now seen corresponding path program 74 times [2020-12-23 07:11:03,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:03,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71530592] [2020-12-23 07:11:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:08,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71530592] [2020-12-23 07:11:08,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490187386] [2020-12-23 07:11:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:08,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:11:08,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 07:11:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6631 backedges. 684 proven. 5700 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:08,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:08,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 07:11:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274461741] [2020-12-23 07:11:08,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 07:11:08,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 07:11:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:08,473 INFO L87 Difference]: Start difference. First operand 193 states and 199 transitions. Second operand 79 states. [2020-12-23 07:11:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:09,061 INFO L93 Difference]: Finished difference Result 236 states and 249 transitions. [2020-12-23 07:11:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 07:11:09,062 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 188 [2020-12-23 07:11:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:09,062 INFO L225 Difference]: With dead ends: 236 [2020-12-23 07:11:09,063 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 07:11:09,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:11:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 07:11:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2020-12-23 07:11:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 07:11:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 201 transitions. [2020-12-23 07:11:09,074 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 201 transitions. Word has length 188 [2020-12-23 07:11:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:09,074 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 201 transitions. [2020-12-23 07:11:09,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 07:11:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 201 transitions. [2020-12-23 07:11:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 07:11:09,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:09,076 INFO L422 BasicCegarLoop]: trace histogram [81, 76, 21, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:09,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:09,289 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash 651850171, now seen corresponding path program 75 times [2020-12-23 07:11:09,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:09,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469109790] [2020-12-23 07:11:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 693 proven. 5852 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 07:11:13,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469109790] [2020-12-23 07:11:13,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151589669] [2020-12-23 07:11:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-23 07:11:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:11:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6792 backedges. 836 proven. 25 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2020-12-23 07:11:14,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:14,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 8] total 85 [2020-12-23 07:11:14,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252819468] [2020-12-23 07:11:14,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 07:11:14,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 07:11:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:11:14,773 INFO L87 Difference]: Start difference. First operand 195 states and 201 transitions. Second operand 85 states. [2020-12-23 07:11:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:15,378 INFO L93 Difference]: Finished difference Result 241 states and 257 transitions. [2020-12-23 07:11:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 07:11:15,379 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 190 [2020-12-23 07:11:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:15,380 INFO L225 Difference]: With dead ends: 241 [2020-12-23 07:11:15,380 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 07:11:15,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:11:15,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 07:11:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-23 07:11:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 07:11:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 206 transitions. [2020-12-23 07:11:15,393 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 206 transitions. Word has length 190 [2020-12-23 07:11:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:15,393 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 206 transitions. [2020-12-23 07:11:15,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 07:11:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 206 transitions. [2020-12-23 07:11:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 07:11:15,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:15,394 INFO L422 BasicCegarLoop]: trace histogram [83, 77, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:15,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-23 07:11:15,596 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 185817155, now seen corresponding path program 76 times [2020-12-23 07:11:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:15,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452690735] [2020-12-23 07:11:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:20,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452690735] [2020-12-23 07:11:20,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655367172] [2020-12-23 07:11:20,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:20,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:11:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:11:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 858 proven. 6006 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:20,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:20,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:11:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349855147] [2020-12-23 07:11:20,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:11:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:11:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:20,607 INFO L87 Difference]: Start difference. First operand 199 states and 206 transitions. Second operand 81 states. [2020-12-23 07:11:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:21,156 INFO L93 Difference]: Finished difference Result 244 states and 259 transitions. [2020-12-23 07:11:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:11:21,157 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 194 [2020-12-23 07:11:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:21,159 INFO L225 Difference]: With dead ends: 244 [2020-12-23 07:11:21,159 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 07:11:21,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:11:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 07:11:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-12-23 07:11:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-23 07:11:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-12-23 07:11:21,176 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 194 [2020-12-23 07:11:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:21,177 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-12-23 07:11:21,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:11:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-12-23 07:11:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-23 07:11:21,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:21,178 INFO L422 BasicCegarLoop]: trace histogram [84, 78, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:21,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:21,378 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 327003366, now seen corresponding path program 77 times [2020-12-23 07:11:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:21,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718357142] [2020-12-23 07:11:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:11:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:26,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718357142] [2020-12-23 07:11:26,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115086888] [2020-12-23 07:11:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:26,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2020-12-23 07:11:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:11:26,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 07:11:26,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:11:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7287 backedges. 869 proven. 6162 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 07:11:26,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:11:26,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 07:11:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004236414] [2020-12-23 07:11:26,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:11:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:11:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:11:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:11:26,590 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 82 states. [2020-12-23 07:11:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:11:27,160 INFO L93 Difference]: Finished difference Result 246 states and 261 transitions. [2020-12-23 07:11:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 07:11:27,161 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 196 [2020-12-23 07:11:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:11:27,162 INFO L225 Difference]: With dead ends: 246 [2020-12-23 07:11:27,162 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 07:11:27,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:11:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 07:11:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-12-23 07:11:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 07:11:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 210 transitions. [2020-12-23 07:11:27,187 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 210 transitions. Word has length 196 [2020-12-23 07:11:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:11:27,188 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 210 transitions. [2020-12-23 07:11:27,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:11:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 210 transitions. [2020-12-23 07:11:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 07:11:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:11:27,189 INFO L422 BasicCegarLoop]: trace histogram [85, 79, 21, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:11:27,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:11:27,404 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:11:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:11:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1432001335, now seen corresponding path program 78 times [2020-12-23 07:11:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:11:27,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516269400] [2020-12-23 07:11:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:11:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat