/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/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:29:09,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:29:09,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:29:09,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:29:09,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:29:09,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:29:09,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:29:09,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:29:09,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:29:09,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:29:09,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:29:09,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:29:09,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:29:09,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:29:09,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:29:09,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:29:09,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:29:09,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:29:09,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:29:09,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:29:09,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:29:09,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:29:09,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:29:09,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:29:09,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:29:09,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:29:09,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:29:09,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:29:09,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:29:09,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:29:09,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:29:09,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:29:09,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:29:09,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:29:09,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:29:09,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:29:09,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:29:09,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:29:09,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:29:09,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:29:09,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:29:09,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:29:09,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:29:09,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:29:09,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:29:09,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:29:09,999 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:29:10,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:29:10,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:29:10,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:29:10,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:29:10,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:29:10,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:29:10,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:29:10,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:29:10,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:29:10,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:29:10,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:29:10,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:29:10,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:29:10,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:29:10,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:29:10,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:29:10,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:29:10,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:29:10,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:29:10,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:29:10,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:29:10,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:29:10,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:29:10,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:29:10,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:29:10,515 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:29:10,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2020-12-21 21:29:10,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f7a4c4a/19fb803a60994275b7cd227b0e5134a0/FLAG264bbe17a [2020-12-21 21:29:11,318 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:29:11,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2020-12-21 21:29:11,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f7a4c4a/19fb803a60994275b7cd227b0e5134a0/FLAG264bbe17a [2020-12-21 21:29:11,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09f7a4c4a/19fb803a60994275b7cd227b0e5134a0 [2020-12-21 21:29:11,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:29:11,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:29:11,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:11,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:29:11,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:29:11,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:11" (1/1) ... [2020-12-21 21:29:11,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b74dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:11, skipping insertion in model container [2020-12-21 21:29:11,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:29:11" (1/1) ... [2020-12-21 21:29:11,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:29:11,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:29:11,907 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2020-12-21 21:29:11,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:11,950 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:29:11,976 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i[821,834] [2020-12-21 21:29:12,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:29:12,041 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:29:12,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12 WrapperNode [2020-12-21 21:29:12,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:29:12,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:12,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:29:12,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:29:12,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:29:12,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:29:12,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:29:12,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:29:12,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... [2020-12-21 21:29:12,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:29:12,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:29:12,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:29:12,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:29:12,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:29:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:29:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:29:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:29:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:29:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:29:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:29:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:29:12,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:29:12,685 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-21 21:29:12,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:12 BoogieIcfgContainer [2020-12-21 21:29:12,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:29:12,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:29:12,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:29:12,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:29:12,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:29:11" (1/3) ... [2020-12-21 21:29:12,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2dc24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:12, skipping insertion in model container [2020-12-21 21:29:12,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:29:12" (2/3) ... [2020-12-21 21:29:12,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2dc24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:12, skipping insertion in model container [2020-12-21 21:29:12,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:12" (3/3) ... [2020-12-21 21:29:12,736 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2020-12-21 21:29:12,754 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:29:12,761 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:29:12,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:29:12,815 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:29:12,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:29:12,816 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:29:12,816 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:29:12,816 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:29:12,816 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:29:12,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:29:12,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:29:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-21 21:29:12,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:29:12,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:12,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:12,845 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:12,853 INFO L82 PathProgramCache]: Analyzing trace with hash -211808190, now seen corresponding path program 1 times [2020-12-21 21:29:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:12,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249402272] [2020-12-21 21:29:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:29:13,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249402272] [2020-12-21 21:29:13,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:29:13,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:29:13,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480542499] [2020-12-21 21:29:13,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:13,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:13,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:13,106 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-21 21:29:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:13,204 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2020-12-21 21:29:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:13,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-21 21:29:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:13,217 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:29:13,218 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:29:13,221 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 [2020-12-21 21:29:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:29:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-21 21:29:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:29:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-21 21:29:13,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-12-21 21:29:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:13,264 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-21 21:29:13,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-21 21:29:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:29:13,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:13,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:13,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:29:13,266 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash 343774103, now seen corresponding path program 1 times [2020-12-21 21:29:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:13,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479951443] [2020-12-21 21:29:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:29:13,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479951443] [2020-12-21 21:29:13,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496007873] [2020-12-21 21:29:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:29:13,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:13,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:13,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30290744] [2020-12-21 21:29:13,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:13,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:13,533 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-21 21:29:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:13,648 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-21 21:29:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:13,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-21 21:29:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:13,650 INFO L225 Difference]: With dead ends: 52 [2020-12-21 21:29:13,651 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 21:29:13,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 21:29:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-21 21:29:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:29:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-21 21:29:13,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-12-21 21:29:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:13,660 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-21 21:29:13,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-21 21:29:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:29:13,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:13,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:13,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:29:13,878 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash -314392746, now seen corresponding path program 2 times [2020-12-21 21:29:13,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:13,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464943234] [2020-12-21 21:29:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:13,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464943234] [2020-12-21 21:29:13,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387989255] [2020-12-21 21:29:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:14,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:14,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:29:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:14,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:14,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:29:14,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247781787] [2020-12-21 21:29:14,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:29:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:29:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:14,173 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-21 21:29:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:14,317 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-21 21:29:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:29:14,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-21 21:29:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:14,320 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:29:14,320 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:29:14,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:29:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:29:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-21 21:29:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:29:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-21 21:29:14,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2020-12-21 21:29:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:14,330 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-21 21:29:14,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:29:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-21 21:29:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:29:14,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:14,333 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:14,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:14,537 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:14,539 INFO L82 PathProgramCache]: Analyzing trace with hash -881131413, now seen corresponding path program 3 times [2020-12-21 21:29:14,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930785098] [2020-12-21 21:29:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:29:14,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930785098] [2020-12-21 21:29:14,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245508427] [2020-12-21 21:29:14,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:14,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:29:14,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:29:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:29:14,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:14,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:29:14,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766196787] [2020-12-21 21:29:14,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:29:14,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:14,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:29:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:14,878 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-12-21 21:29:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:15,022 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-12-21 21:29:15,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:29:15,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-21 21:29:15,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:15,024 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:29:15,024 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:29:15,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:29:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-21 21:29:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:29:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-21 21:29:15,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2020-12-21 21:29:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:15,034 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-21 21:29:15,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:29:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-21 21:29:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:29:15,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:15,036 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:15,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:15,251 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:15,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1712584598, now seen corresponding path program 4 times [2020-12-21 21:29:15,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:15,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190947871] [2020-12-21 21:29:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-21 21:29:15,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190947871] [2020-12-21 21:29:15,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969995652] [2020-12-21 21:29:15,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:15,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:29:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-21 21:29:15,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:15,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:29:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249700611] [2020-12-21 21:29:15,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:29:15,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:29:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:15,615 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2020-12-21 21:29:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:15,826 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-12-21 21:29:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:29:15,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 21:29:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:15,831 INFO L225 Difference]: With dead ends: 91 [2020-12-21 21:29:15,831 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:29:15,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:29:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-12-21 21:29:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:29:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-21 21:29:15,858 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2020-12-21 21:29:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:15,858 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-21 21:29:15,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:29:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-21 21:29:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:29:15,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:15,864 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:16,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:16,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash 702691135, now seen corresponding path program 5 times [2020-12-21 21:29:16,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:16,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816488438] [2020-12-21 21:29:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:29:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816488438] [2020-12-21 21:29:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193121214] [2020-12-21 21:29:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:17,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:29:17,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:29:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-12-21 21:29:18,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:18,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:29:18,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062240478] [2020-12-21 21:29:18,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:29:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:29:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:18,027 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 9 states. [2020-12-21 21:29:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:18,228 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-12-21 21:29:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:29:18,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-21 21:29:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:18,230 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:29:18,231 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:29:18,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:29:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:29:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-21 21:29:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:29:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-21 21:29:18,238 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2020-12-21 21:29:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:18,239 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-21 21:29:18,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:29:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-21 21:29:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:29:18,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:18,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:18,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:29:18,454 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash 240839550, now seen corresponding path program 6 times [2020-12-21 21:29:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:18,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989534126] [2020-12-21 21:29:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-12-21 21:29:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989534126] [2020-12-21 21:29:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484218769] [2020-12-21 21:29:18,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:19,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:29:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:29:19,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-21 21:29:19,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:19,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:29:19,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628986348] [2020-12-21 21:29:19,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:29:19,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:29:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:19,284 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 10 states. [2020-12-21 21:29:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:19,423 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-21 21:29:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:29:19,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-12-21 21:29:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:19,425 INFO L225 Difference]: With dead ends: 117 [2020-12-21 21:29:19,425 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:29:19,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:29:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:29:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-21 21:29:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:29:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-12-21 21:29:19,433 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2020-12-21 21:29:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:19,433 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-12-21 21:29:19,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:29:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-12-21 21:29:19,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-21 21:29:19,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:19,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:19,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:19,649 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2046937069, now seen corresponding path program 7 times [2020-12-21 21:29:19,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:19,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605538656] [2020-12-21 21:29:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:29:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605538656] [2020-12-21 21:29:19,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343056505] [2020-12-21 21:29:19,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:29:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:29:20,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:20,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:29:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173371696] [2020-12-21 21:29:20,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:29:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:29:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:20,038 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 11 states. [2020-12-21 21:29:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:20,192 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-12-21 21:29:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:29:20,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-12-21 21:29:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:20,200 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:29:20,200 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:29:20,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:29:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:29:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-21 21:29:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:29:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-21 21:29:20,222 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2020-12-21 21:29:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:20,223 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-21 21:29:20,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:29:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-21 21:29:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:29:20,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:20,227 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:20,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:20,428 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1433507694, now seen corresponding path program 8 times [2020-12-21 21:29:20,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:20,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65325383] [2020-12-21 21:29:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-21 21:29:20,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65325383] [2020-12-21 21:29:20,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087179011] [2020-12-21 21:29:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:20,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:20,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:20,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:29:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-21 21:29:20,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:20,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:29:20,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786694855] [2020-12-21 21:29:20,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:29:20,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:20,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:29:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:20,779 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 12 states. [2020-12-21 21:29:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:20,942 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-12-21 21:29:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:29:20,942 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-12-21 21:29:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:20,943 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:29:20,943 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:29:20,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:29:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:29:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-12-21 21:29:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:29:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-12-21 21:29:20,950 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2020-12-21 21:29:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:20,950 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-12-21 21:29:20,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:29:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-12-21 21:29:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:29:20,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:20,952 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:21,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:29:21,163 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1545208551, now seen corresponding path program 9 times [2020-12-21 21:29:21,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:21,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258471667] [2020-12-21 21:29:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:29:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258471667] [2020-12-21 21:29:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407987969] [2020-12-21 21:29:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:21,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:29:21,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:29:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-21 21:29:22,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:29:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202414196] [2020-12-21 21:29:22,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:29:22,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:29:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:22,043 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 13 states. [2020-12-21 21:29:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:22,228 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2020-12-21 21:29:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:29:22,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 21:29:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:22,230 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:29:22,230 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:29:22,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:29:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:29:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-21 21:29:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:29:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-21 21:29:22,238 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2020-12-21 21:29:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:22,238 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-21 21:29:22,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:29:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-21 21:29:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:29:22,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:22,239 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:22,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:22,453 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash -108691546, now seen corresponding path program 10 times [2020-12-21 21:29:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:22,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634451536] [2020-12-21 21:29:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:29:22,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634451536] [2020-12-21 21:29:22,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244170827] [2020-12-21 21:29:22,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-21 21:29:22,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:22,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:29:22,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-12-21 21:29:22,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:22,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:29:22,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213747473] [2020-12-21 21:29:22,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:29:22,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:22,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:29:22,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:22,858 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 14 states. [2020-12-21 21:29:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:23,049 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2020-12-21 21:29:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:29:23,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-12-21 21:29:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:23,051 INFO L225 Difference]: With dead ends: 169 [2020-12-21 21:29:23,051 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:29:23,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:29:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:29:23,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-12-21 21:29:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 21:29:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-21 21:29:23,058 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2020-12-21 21:29:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:23,058 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-21 21:29:23,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:29:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-21 21:29:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 21:29:23,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:23,060 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:23,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:23,274 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash -293562437, now seen corresponding path program 11 times [2020-12-21 21:29:23,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:23,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056126169] [2020-12-21 21:29:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-21 21:29:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056126169] [2020-12-21 21:29:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433054268] [2020-12-21 21:29:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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