/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/nla-digbench-scaling/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:51:41,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:51:41,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:51:41,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:51:41,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:51:41,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:51:41,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:51:41,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:51:41,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:51:41,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:51:41,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:51:41,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:51:41,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:51:41,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:51:41,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:51:41,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:51:41,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:51:41,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:51:41,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:51:41,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:51:41,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:51:41,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:51:41,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:51:41,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:51:41,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:51:41,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:51:41,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:51:41,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:51:41,338 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 07:51:41,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:51:41,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:51:41,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:51:41,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:51:41,395 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:51:41,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:51:41,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:51:41,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:51:41,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:51:41,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:51:41,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:51:41,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:51:41,397 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:51:41,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:51:41,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:51:41,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:51:41,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:51:41,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:51:41,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:51:41,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:51:41,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:51:41,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:51:41,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:51:41,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:51:41,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:51:41,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:51:41,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:51:41,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:51:41,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:51:41,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:51:41,797 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:51:41,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2020-12-23 07:51:41,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17fa9aecf/1b6c16f2d4db4108a08b63bc7930eedd/FLAG1eab90c49 [2020-12-23 07:51:42,504 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:51:42,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2020-12-23 07:51:42,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17fa9aecf/1b6c16f2d4db4108a08b63bc7930eedd/FLAG1eab90c49 [2020-12-23 07:51:42,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/17fa9aecf/1b6c16f2d4db4108a08b63bc7930eedd [2020-12-23 07:51:42,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:51:42,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:51:42,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:51:42,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:51:42,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:51:42,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:51:42" (1/1) ... [2020-12-23 07:51:42,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7cb94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:42, skipping insertion in model container [2020-12-23 07:51:42,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:51:42" (1/1) ... [2020-12-23 07:51:42,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:51:42,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:51:43,168 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/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 07:51:43,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:51:43,221 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:51:43,238 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/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2020-12-23 07:51:43,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:51:43,289 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:51:43,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43 WrapperNode [2020-12-23 07:51:43,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:51:43,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:51:43,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:51:43,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:51:43,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:51:43,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:51:43,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:51:43,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:51:43,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (1/1) ... [2020-12-23 07:51:43,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:51:43,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:51:43,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:51:43,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:51:43,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (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 07:51:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:51:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:51:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:51:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:51:43,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:51:43,845 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-23 07:51:43,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:51:43 BoogieIcfgContainer [2020-12-23 07:51:43,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:51:43,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:51:43,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:51:43,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:51:43,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:51:42" (1/3) ... [2020-12-23 07:51:43,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a675475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:51:43, skipping insertion in model container [2020-12-23 07:51:43,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:43" (2/3) ... [2020-12-23 07:51:43,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a675475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:51:43, skipping insertion in model container [2020-12-23 07:51:43,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:51:43" (3/3) ... [2020-12-23 07:51:43,858 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2020-12-23 07:51:43,866 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:51:43,871 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-23 07:51:43,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-23 07:51:43,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:51:43,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:51:43,919 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:51:43,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:51:43,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:51:43,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:51:43,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:51:43,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:51:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-23 07:51:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:51:43,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:43,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:43,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2020-12-23 07:51:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:43,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789684690] [2020-12-23 07:51:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:44,120 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 07:51:44,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789684690] [2020-12-23 07:51:44,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:44,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:51:44,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923622603] [2020-12-23 07:51:44,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:51:44,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:51:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:51:44,147 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-12-23 07:51:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:44,170 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-12-23 07:51:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:51:44,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 07:51:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:44,182 INFO L225 Difference]: With dead ends: 79 [2020-12-23 07:51:44,183 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:51:44,186 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 07:51:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:51:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:51:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:51:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 07:51:44,227 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2020-12-23 07:51:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:44,227 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 07:51:44,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:51:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 07:51:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:51:44,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:44,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:44,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:51:44,229 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-23 07:51:44,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:44,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724975842] [2020-12-23 07:51:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:44,397 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 07:51:44,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724975842] [2020-12-23 07:51:44,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:44,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:51:44,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145748735] [2020-12-23 07:51:44,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:51:44,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:51:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:51:44,410 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-23 07:51:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:44,600 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-23 07:51:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:51:44,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 07:51:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:44,603 INFO L225 Difference]: With dead ends: 61 [2020-12-23 07:51:44,603 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:51:44,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:51:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:51:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-12-23 07:51:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:51:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 07:51:44,613 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2020-12-23 07:51:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:44,613 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 07:51:44,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:51:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 07:51:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:51:44,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:44,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:44,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 07:51:44,615 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2020-12-23 07:51:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:44,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390354401] [2020-12-23 07:51:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:44,684 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 07:51:44,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390354401] [2020-12-23 07:51:44,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:44,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:51:44,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384986976] [2020-12-23 07:51:44,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:51:44,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:51:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:51:44,687 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-12-23 07:51:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:44,726 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-23 07:51:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:51:44,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 07:51:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:44,731 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:51:44,731 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:51:44,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:51:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:51:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:51:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:51:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 07:51:44,744 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-23 07:51:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:44,745 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 07:51:44,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:51:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 07:51:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:51:44,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:44,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:44,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 07:51:44,746 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:44,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2020-12-23 07:51:44,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:44,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489620704] [2020-12-23 07:51:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:44,840 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 07:51:44,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489620704] [2020-12-23 07:51:44,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:44,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:51:44,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709850220] [2020-12-23 07:51:44,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:51:44,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:51:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:51:44,847 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-12-23 07:51:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:45,035 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-23 07:51:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:51:45,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 07:51:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:45,039 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:51:45,039 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:51:45,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:51:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:51:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-23 07:51:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:51:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 07:51:45,067 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2020-12-23 07:51:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:45,067 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 07:51:45,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:51:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 07:51:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:51:45,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:45,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:45,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 07:51:45,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2020-12-23 07:51:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:45,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794045129] [2020-12-23 07:51:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:45,111 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:45,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999155361] [2020-12-23 07:51:45,112 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 07:51:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:51:45,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:45,298 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 07:51:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794045129] [2020-12-23 07:51:45,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:45,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999155361] [2020-12-23 07:51:45,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:45,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:51:45,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32953543] [2020-12-23 07:51:45,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:45,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:45,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:45,302 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-23 07:51:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:45,475 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-23 07:51:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:51:45,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 07:51:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:45,477 INFO L225 Difference]: With dead ends: 81 [2020-12-23 07:51:45,477 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 07:51:45,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:51:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 07:51:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-12-23 07:51:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 07:51:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-23 07:51:45,487 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 12 [2020-12-23 07:51:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:45,488 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-23 07:51:45,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:51:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-23 07:51:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:51:45,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:45,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:45,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:45,703 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2020-12-23 07:51:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:45,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787557025] [2020-12-23 07:51:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:45,719 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:45,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646178517] [2020-12-23 07:51:45,720 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 07:51:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:51:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:46,004 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 07:51:46,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787557025] [2020-12-23 07:51:46,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:46,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646178517] [2020-12-23 07:51:46,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:46,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:51:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935193921] [2020-12-23 07:51:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:51:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:51:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:51:46,007 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 7 states. [2020-12-23 07:51:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:46,435 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-23 07:51:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:51:46,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:51:46,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:46,437 INFO L225 Difference]: With dead ends: 53 [2020-12-23 07:51:46,437 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 07:51:46,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:51:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 07:51:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-23 07:51:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:51:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-23 07:51:46,445 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 16 [2020-12-23 07:51:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:46,445 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-23 07:51:46,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:51:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-23 07:51:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:51:46,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:46,446 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:46,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:46,654 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1571159167, now seen corresponding path program 1 times [2020-12-23 07:51:46,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:46,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805866720] [2020-12-23 07:51:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:46,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:46,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002504331] [2020-12-23 07:51:46,670 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 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 07:51:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:51:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:46,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805866720] [2020-12-23 07:51:46,771 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:46,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002504331] [2020-12-23 07:51:46,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:46,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:51:46,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399974455] [2020-12-23 07:51:46,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:51:46,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:51:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:51:46,773 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-12-23 07:51:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:46,801 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-23 07:51:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:51:46,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 07:51:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:46,802 INFO L225 Difference]: With dead ends: 62 [2020-12-23 07:51:46,802 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 07:51:46,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 07:51:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 07:51:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 07:51:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 07:51:46,810 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 18 [2020-12-23 07:51:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:46,810 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 07:51:46,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:51:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 07:51:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:51:46,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:46,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:47,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:47,027 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1642186908, now seen corresponding path program 1 times [2020-12-23 07:51:47,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:47,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234284060] [2020-12-23 07:51:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:47,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668026498] [2020-12-23 07:51:47,041 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 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 07:51:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:51:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234284060] [2020-12-23 07:51:47,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:47,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668026498] [2020-12-23 07:51:47,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:47,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:51:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059242739] [2020-12-23 07:51:47,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:51:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:51:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:51:47,301 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2020-12-23 07:51:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:47,730 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-12-23 07:51:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:51:47,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 07:51:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:47,732 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:51:47,732 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 07:51:47,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:51:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 07:51:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-12-23 07:51:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 07:51:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-12-23 07:51:47,743 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 20 [2020-12-23 07:51:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:47,744 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-12-23 07:51:47,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:51:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-12-23 07:51:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 07:51:47,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:47,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:47,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:47,959 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1958905870, now seen corresponding path program 1 times [2020-12-23 07:51:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:47,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624024679] [2020-12-23 07:51:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:47,972 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:47,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336733196] [2020-12-23 07:51:47,972 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 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 07:51:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:51:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624024679] [2020-12-23 07:51:48,248 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336733196] [2020-12-23 07:51:48,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:51:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975915805] [2020-12-23 07:51:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:51:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:51:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:51:48,250 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 8 states. [2020-12-23 07:51:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:48,891 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-23 07:51:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:51:48,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 07:51:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:48,893 INFO L225 Difference]: With dead ends: 74 [2020-12-23 07:51:48,893 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 07:51:48,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:51:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 07:51:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-12-23 07:51:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:51:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-12-23 07:51:48,902 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2020-12-23 07:51:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:48,903 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-12-23 07:51:48,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:51:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-12-23 07:51:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:51:48,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:48,904 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:49,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:49,118 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1637703955, now seen corresponding path program 2 times [2020-12-23 07:51:49,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:49,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293195483] [2020-12-23 07:51:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:49,129 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:49,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517335] [2020-12-23 07:51:49,130 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 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 07:51:49,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:51:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:51:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:51:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 07:51:49,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293195483] [2020-12-23 07:51:49,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:49,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517335] [2020-12-23 07:51:49,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:49,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:51:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885207954] [2020-12-23 07:51:49,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:51:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:51:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:51:49,253 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 5 states. [2020-12-23 07:51:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:49,293 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-12-23 07:51:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:51:49,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 07:51:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:49,298 INFO L225 Difference]: With dead ends: 87 [2020-12-23 07:51:49,298 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 07:51:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 07:51:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-12-23 07:51:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:51:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-23 07:51:49,311 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 26 [2020-12-23 07:51:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:49,311 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-23 07:51:49,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:51:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-23 07:51:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:51:49,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:49,317 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] [2020-12-23 07:51:49,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:49,530 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:49,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2020-12-23 07:51:49,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:49,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610424301] [2020-12-23 07:51:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:49,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:49,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341640467] [2020-12-23 07:51:49,541 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 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 07:51:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:51:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610424301] [2020-12-23 07:51:49,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341640467] [2020-12-23 07:51:49,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:49,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:51:49,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065976278] [2020-12-23 07:51:49,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:49,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:49,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:49,689 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 6 states. [2020-12-23 07:51:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:49,711 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-23 07:51:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:51:49,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-23 07:51:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:49,714 INFO L225 Difference]: With dead ends: 65 [2020-12-23 07:51:49,714 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 07:51:49,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 07:51:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-23 07:51:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 07:51:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-23 07:51:49,738 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 27 [2020-12-23 07:51:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:49,738 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-23 07:51:49,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:51:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-23 07:51:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:51:49,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:49,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:49,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:49,955 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:49,956 INFO L82 PathProgramCache]: Analyzing trace with hash -770811653, now seen corresponding path program 1 times [2020-12-23 07:51:49,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:49,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807312622] [2020-12-23 07:51:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:49,967 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:49,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287474190] [2020-12-23 07:51:49,968 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 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 07:51:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:51:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:50,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807312622] [2020-12-23 07:51:50,069 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:50,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287474190] [2020-12-23 07:51:50,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:50,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:51:50,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820800576] [2020-12-23 07:51:50,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:50,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:50,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:50,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:50,071 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2020-12-23 07:51:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:50,114 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-12-23 07:51:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:51:50,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-23 07:51:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:50,115 INFO L225 Difference]: With dead ends: 70 [2020-12-23 07:51:50,115 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 07:51:50,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:51:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 07:51:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 07:51:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 07:51:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-12-23 07:51:50,123 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 27 [2020-12-23 07:51:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:50,124 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-12-23 07:51:50,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:51:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-12-23 07:51:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:51:50,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:50,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:50,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:51:50,342 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1711245194, now seen corresponding path program 2 times [2020-12-23 07:51:50,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:50,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651016582] [2020-12-23 07:51:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:50,352 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:50,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763232941] [2020-12-23 07:51:50,353 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 07:51:50,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:51:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:51:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 07:51:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651016582] [2020-12-23 07:51:50,788 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:50,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763232941] [2020-12-23 07:51:50,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:50,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:51:50,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010022075] [2020-12-23 07:51:50,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:51:50,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:50,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:51:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:51:50,794 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 12 states. [2020-12-23 07:51:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:54,117 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-12-23 07:51:54,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:51:54,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 07:51:54,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:54,118 INFO L225 Difference]: With dead ends: 119 [2020-12-23 07:51:54,118 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 07:51:54,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:51:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 07:51:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2020-12-23 07:51:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 07:51:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2020-12-23 07:51:54,129 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 28 [2020-12-23 07:51:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:54,129 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2020-12-23 07:51:54,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:51:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2020-12-23 07:51:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 07:51:54,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:54,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:54,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:54,344 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1339843922, now seen corresponding path program 1 times [2020-12-23 07:51:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:54,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042830848] [2020-12-23 07:51:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:54,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:54,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565157353] [2020-12-23 07:51:54,356 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 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 07:51:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:51:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042830848] [2020-12-23 07:51:54,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565157353] [2020-12-23 07:51:54,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:54,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:51:54,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979137089] [2020-12-23 07:51:54,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:51:54,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:51:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:51:54,796 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 10 states. [2020-12-23 07:51:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:55,494 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2020-12-23 07:51:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:51:55,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-23 07:51:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:55,496 INFO L225 Difference]: With dead ends: 101 [2020-12-23 07:51:55,496 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 07:51:55,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:51:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 07:51:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-12-23 07:51:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 07:51:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-12-23 07:51:55,507 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 31 [2020-12-23 07:51:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:55,507 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-12-23 07:51:55,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:51:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-12-23 07:51:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:51:55,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:55,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:55,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:55,722 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1414538084, now seen corresponding path program 1 times [2020-12-23 07:51:55,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:55,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110712644] [2020-12-23 07:51:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:55,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:55,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514802616] [2020-12-23 07:51:55,734 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 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 07:51:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:51:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:55,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110712644] [2020-12-23 07:51:55,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:55,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514802616] [2020-12-23 07:51:55,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:55,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:51:55,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522777563] [2020-12-23 07:51:55,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:51:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:51:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:51:55,856 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 7 states. [2020-12-23 07:51:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:55,901 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-12-23 07:51:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:51:55,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 07:51:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:55,902 INFO L225 Difference]: With dead ends: 97 [2020-12-23 07:51:55,902 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:51:55,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:51:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:51:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-23 07:51:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 07:51:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2020-12-23 07:51:55,913 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 32 [2020-12-23 07:51:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:55,913 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2020-12-23 07:51:55,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:51:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2020-12-23 07:51:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 07:51:55,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:55,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:56,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 07:51:56,127 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:56,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:56,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1150939168, now seen corresponding path program 2 times [2020-12-23 07:51:56,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:56,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304222145] [2020-12-23 07:51:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:56,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:56,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603379558] [2020-12-23 07:51:56,137 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 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 07:51:56,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:51:56,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:51:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 07:51:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 07:51:56,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304222145] [2020-12-23 07:51:56,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603379558] [2020-12-23 07:51:56,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:56,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:51:56,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312118017] [2020-12-23 07:51:56,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:51:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:51:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:51:56,302 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand 7 states. [2020-12-23 07:51:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:56,493 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2020-12-23 07:51:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:51:56,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 07:51:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:56,494 INFO L225 Difference]: With dead ends: 113 [2020-12-23 07:51:56,494 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:51:56,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:51:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:51:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-12-23 07:51:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 07:51:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-12-23 07:51:56,506 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 32 [2020-12-23 07:51:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:56,506 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-12-23 07:51:56,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:51:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-12-23 07:51:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:51:56,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:56,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:56,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:51:56,722 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash -900022411, now seen corresponding path program 1 times [2020-12-23 07:51:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088114356] [2020-12-23 07:51:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:56,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:56,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510797617] [2020-12-23 07:51:56,746 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 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 07:51:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 07:51:56,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088114356] [2020-12-23 07:51:57,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510797617] [2020-12-23 07:51:57,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:57,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:51:57,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886417551] [2020-12-23 07:51:57,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:51:57,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:57,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:51:57,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:51:57,084 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 9 states. [2020-12-23 07:51:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:57,590 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-12-23 07:51:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:51:57,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-12-23 07:51:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:57,591 INFO L225 Difference]: With dead ends: 132 [2020-12-23 07:51:57,592 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 07:51:57,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:51:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 07:51:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-12-23 07:51:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 07:51:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2020-12-23 07:51:57,607 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 33 [2020-12-23 07:51:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:57,607 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2020-12-23 07:51:57,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:51:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2020-12-23 07:51:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:51:57,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:57,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:57,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:51:57,824 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 918142130, now seen corresponding path program 1 times [2020-12-23 07:51:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:57,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598108820] [2020-12-23 07:51:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:57,835 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:57,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829749163] [2020-12-23 07:51:57,835 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 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 07:51:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:51:57,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598108820] [2020-12-23 07:51:58,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:58,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829749163] [2020-12-23 07:51:58,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:58,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:51:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293613882] [2020-12-23 07:51:58,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:51:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:51:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:51:58,147 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 10 states. [2020-12-23 07:51:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:59,123 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-12-23 07:51:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:51:59,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-12-23 07:51:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:59,125 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:51:59,125 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 07:51:59,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:51:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 07:51:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2020-12-23 07:51:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 07:51:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-12-23 07:51:59,137 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 36 [2020-12-23 07:51:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:59,137 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-12-23 07:51:59,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:51:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-12-23 07:51:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 07:51:59,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:59,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:59,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:59,353 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1625393032, now seen corresponding path program 3 times [2020-12-23 07:51:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:59,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070669285] [2020-12-23 07:51:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:59,363 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:59,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63141837] [2020-12-23 07:51:59,364 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 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 07:51:59,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:51:59,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:51:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:51:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:52:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 07:52:02,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070669285] [2020-12-23 07:52:02,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:52:02,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63141837] [2020-12-23 07:52:02,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:52:02,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:52:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108697139] [2020-12-23 07:52:02,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:52:02,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:52:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:52:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=30, Unknown=1, NotChecked=0, Total=42 [2020-12-23 07:52:02,021 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 7 states. [2020-12-23 07:53:01,458 WARN L197 SmtUtils]: Spent 18.16 s on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-12-23 07:53:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:40,522 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2020-12-23 07:53:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:53:40,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-12-23 07:53:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:40,524 INFO L225 Difference]: With dead ends: 128 [2020-12-23 07:53:40,524 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 07:53:40,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=63, Invalid=136, Unknown=11, NotChecked=0, Total=210 [2020-12-23 07:53:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 07:53:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-12-23 07:53:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 07:53:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2020-12-23 07:53:40,538 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 36 [2020-12-23 07:53:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:40,539 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2020-12-23 07:53:40,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:53:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2020-12-23 07:53:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:53:40,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:40,540 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:40,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:53:40,755 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1658895220, now seen corresponding path program 1 times [2020-12-23 07:53:40,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:40,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632737393] [2020-12-23 07:53:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:40,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:40,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984838387] [2020-12-23 07:53:40,764 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 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 07:53:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:53:40,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:53:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:40,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632737393] [2020-12-23 07:53:40,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:40,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984838387] [2020-12-23 07:53:40,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:40,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:53:40,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088659287] [2020-12-23 07:53:40,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:53:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:53:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:53:40,908 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 7 states. [2020-12-23 07:53:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:40,975 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-12-23 07:53:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:53:40,975 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-12-23 07:53:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:40,976 INFO L225 Difference]: With dead ends: 106 [2020-12-23 07:53:40,976 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 07:53:40,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:53:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 07:53:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-23 07:53:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 07:53:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-12-23 07:53:40,988 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 37 [2020-12-23 07:53:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:40,988 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-12-23 07:53:40,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:53:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-12-23 07:53:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 07:53:40,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:40,989 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:41,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:53:41,191 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash 406136064, now seen corresponding path program 2 times [2020-12-23 07:53:41,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:41,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312363329] [2020-12-23 07:53:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:41,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:41,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487587961] [2020-12-23 07:53:41,202 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 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 07:53:41,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:53:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 07:53:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:41,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312363329] [2020-12-23 07:53:41,878 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:41,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487587961] [2020-12-23 07:53:41,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:53:41,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183034612] [2020-12-23 07:53:41,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:53:41,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:53:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:53:41,880 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 13 states. [2020-12-23 07:53:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:42,950 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2020-12-23 07:53:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:53:42,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-12-23 07:53:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:42,952 INFO L225 Difference]: With dead ends: 150 [2020-12-23 07:53:42,952 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 07:53:42,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-12-23 07:53:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 07:53:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-12-23 07:53:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 07:53:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-12-23 07:53:42,964 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 39 [2020-12-23 07:53:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:42,965 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-12-23 07:53:42,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:53:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-12-23 07:53:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 07:53:42,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:42,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:43,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:53:43,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -294710610, now seen corresponding path program 2 times [2020-12-23 07:53:43,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:43,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692956348] [2020-12-23 07:53:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:43,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:43,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270412958] [2020-12-23 07:53:43,201 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 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 07:53:43,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:53:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:43,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:53:43,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:43,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692956348] [2020-12-23 07:53:43,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270412958] [2020-12-23 07:53:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:43,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:53:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027830188] [2020-12-23 07:53:43,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:53:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:53:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:53:43,372 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 8 states. [2020-12-23 07:53:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:43,424 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-12-23 07:53:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:53:43,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-12-23 07:53:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:43,426 INFO L225 Difference]: With dead ends: 118 [2020-12-23 07:53:43,426 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 07:53:43,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:53:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 07:53:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 07:53:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 07:53:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-23 07:53:43,438 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 40 [2020-12-23 07:53:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:43,438 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-23 07:53:43,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:53:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-23 07:53:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:53:43,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:43,439 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:43,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:53:43,653 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2116618682, now seen corresponding path program 2 times [2020-12-23 07:53:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:43,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370646465] [2020-12-23 07:53:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:43,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:43,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397728840] [2020-12-23 07:53:43,669 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 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 07:53:43,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:53:43,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:43,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:53:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:43,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370646465] [2020-12-23 07:53:43,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:43,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397728840] [2020-12-23 07:53:43,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:43,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:53:43,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706800490] [2020-12-23 07:53:43,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:53:43,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:43,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:53:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:53:43,832 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 8 states. [2020-12-23 07:53:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:43,920 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2020-12-23 07:53:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:53:43,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-12-23 07:53:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:43,922 INFO L225 Difference]: With dead ends: 117 [2020-12-23 07:53:43,922 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 07:53:43,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:53:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 07:53:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-23 07:53:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 07:53:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-12-23 07:53:43,934 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 45 [2020-12-23 07:53:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:43,934 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-12-23 07:53:43,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:53:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-12-23 07:53:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:53:43,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:43,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:44,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 07:53:44,149 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:44,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1302416352, now seen corresponding path program 3 times [2020-12-23 07:53:44,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:44,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141162397] [2020-12-23 07:53:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:44,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:44,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327615134] [2020-12-23 07:53:44,159 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 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 07:53:44,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:53:44,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 07:53:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:45,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:53:45,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 07:53:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141162397] [2020-12-23 07:53:45,311 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:45,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327615134] [2020-12-23 07:53:45,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:45,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:53:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112587120] [2020-12-23 07:53:45,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:53:45,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:53:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:53:45,312 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 17 states. [2020-12-23 07:53:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:46,952 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2020-12-23 07:53:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:53:46,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-23 07:53:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:46,954 INFO L225 Difference]: With dead ends: 159 [2020-12-23 07:53:46,954 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 07:53:46,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:53:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 07:53:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2020-12-23 07:53:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 07:53:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-12-23 07:53:46,967 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 46 [2020-12-23 07:53:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:46,967 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-12-23 07:53:46,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:53:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-12-23 07:53:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:53:46,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:46,968 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:53:47,183 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:47,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1720227954, now seen corresponding path program 3 times [2020-12-23 07:53:47,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:47,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760508156] [2020-12-23 07:53:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:47,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:47,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896873644] [2020-12-23 07:53:47,194 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 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 07:53:47,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:53:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:53:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:47,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760508156] [2020-12-23 07:53:47,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:47,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896873644] [2020-12-23 07:53:47,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:47,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:53:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339979362] [2020-12-23 07:53:47,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:53:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:47,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:53:47,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:53:47,409 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 9 states. [2020-12-23 07:53:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:47,498 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2020-12-23 07:53:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:53:47,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-23 07:53:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:47,500 INFO L225 Difference]: With dead ends: 146 [2020-12-23 07:53:47,500 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 07:53:47,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:53:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 07:53:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2020-12-23 07:53:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 07:53:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 151 transitions. [2020-12-23 07:53:47,514 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 151 transitions. Word has length 47 [2020-12-23 07:53:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:47,514 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 151 transitions. [2020-12-23 07:53:47,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:53:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 151 transitions. [2020-12-23 07:53:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:53:47,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:47,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:47,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 07:53:47,730 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash -621656459, now seen corresponding path program 1 times [2020-12-23 07:53:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:47,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124124885] [2020-12-23 07:53:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:47,746 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452549421] [2020-12-23 07:53:47,746 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 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 07:53:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:53:47,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:53:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124124885] [2020-12-23 07:53:47,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:47,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452549421] [2020-12-23 07:53:47,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:53:47,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:53:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919553297] [2020-12-23 07:53:47,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:53:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:53:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:53:47,909 INFO L87 Difference]: Start difference. First operand 129 states and 151 transitions. Second operand 6 states. [2020-12-23 07:53:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:48,007 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-12-23 07:53:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:53:48,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-12-23 07:53:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:48,009 INFO L225 Difference]: With dead ends: 207 [2020-12-23 07:53:48,009 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 07:53:48,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:53:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 07:53:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-12-23 07:53:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 07:53:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2020-12-23 07:53:48,026 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 47 [2020-12-23 07:53:48,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:48,027 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2020-12-23 07:53:48,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:53:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2020-12-23 07:53:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:53:48,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:48,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:48,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:53:48,242 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash -572369234, now seen corresponding path program 4 times [2020-12-23 07:53:48,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:48,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267101488] [2020-12-23 07:53:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:48,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:48,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385362557] [2020-12-23 07:53:48,250 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 07:53:48,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:53:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:53:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267101488] [2020-12-23 07:53:48,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385362557] [2020-12-23 07:53:48,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:48,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:53:48,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855095744] [2020-12-23 07:53:48,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:53:48,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:53:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:53:48,954 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand 13 states. [2020-12-23 07:53:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:50,338 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2020-12-23 07:53:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:53:50,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-12-23 07:53:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:50,340 INFO L225 Difference]: With dead ends: 236 [2020-12-23 07:53:50,341 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 07:53:50,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:53:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 07:53:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2020-12-23 07:53:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 07:53:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 203 transitions. [2020-12-23 07:53:50,359 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 203 transitions. Word has length 47 [2020-12-23 07:53:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:50,359 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 203 transitions. [2020-12-23 07:53:50,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:53:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 203 transitions. [2020-12-23 07:53:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 07:53:50,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:50,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:50,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:53:50,578 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1786473789, now seen corresponding path program 2 times [2020-12-23 07:53:50,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:50,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578919212] [2020-12-23 07:53:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:50,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:50,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180533337] [2020-12-23 07:53:50,589 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 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 07:53:50,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:53:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:53:50,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:51,827 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-12-23 07:53:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:53:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578919212] [2020-12-23 07:53:51,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180533337] [2020-12-23 07:53:51,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:53:51,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 07:53:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502186117] [2020-12-23 07:53:51,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:53:51,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:53:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:53:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:53:51,992 INFO L87 Difference]: Start difference. First operand 166 states and 203 transitions. Second operand 18 states. [2020-12-23 07:53:53,790 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-12-23 07:53:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:53:53,958 INFO L93 Difference]: Finished difference Result 202 states and 247 transitions. [2020-12-23 07:53:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:53:53,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-12-23 07:53:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:53:53,960 INFO L225 Difference]: With dead ends: 202 [2020-12-23 07:53:53,961 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 07:53:53,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2020-12-23 07:53:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 07:53:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-12-23 07:53:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 07:53:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 209 transitions. [2020-12-23 07:53:53,979 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 209 transitions. Word has length 48 [2020-12-23 07:53:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:53:53,980 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 209 transitions. [2020-12-23 07:53:53,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:53:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 209 transitions. [2020-12-23 07:53:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 07:53:53,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:53:53,981 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:53:54,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:53:54,194 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:53:54,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:53:54,195 INFO L82 PathProgramCache]: Analyzing trace with hash -290862639, now seen corresponding path program 3 times [2020-12-23 07:53:54,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:53:54,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530156763] [2020-12-23 07:53:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:53:54,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:53:54,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303715445] [2020-12-23 07:53:54,201 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 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 07:53:54,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:53:54,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:53:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 07:53:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:53:56,700 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-12-23 07:53:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530156763] [2020-12-23 07:53:56,911 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:53:56,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303715445] [2020-12-23 07:53:56,911 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:53:56,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:53:56,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:53:56,911 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:53:56,911 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:53:57,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 07:53:57,153 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:53:57,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:53:57 BoogieIcfgContainer [2020-12-23 07:53:57,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:53:57,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:53:57,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:53:57,155 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:53:57,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:51:43" (3/4) ... [2020-12-23 07:53:57,159 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:53:57,159 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:53:57,160 INFO L168 Benchmark]: Toolchain (without parser) took 134269.69 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 127.7 MB in the beginning and 128.2 MB in the end (delta: -517.4 kB). Peak memory consumption was 71.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,161 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:53:57,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.27 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 117.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,162 INFO L168 Benchmark]: Boogie Preprocessor took 51.46 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,163 INFO L168 Benchmark]: RCFGBuilder took 435.45 ms. Allocated memory is still 153.1 MB. Free memory was 114.4 MB in the beginning and 97.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,164 INFO L168 Benchmark]: TraceAbstraction took 133303.66 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 97.4 MB in the beginning and 128.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2020-12-23 07:53:57,164 INFO L168 Benchmark]: Witness Printer took 4.40 ms. Allocated memory is still 224.4 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:53:57,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 394.27 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 117.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 67.01 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 115.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.46 ms. Allocated memory is still 153.1 MB. Free memory was 115.7 MB in the beginning and 114.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 435.45 ms. Allocated memory is still 153.1 MB. Free memory was 114.4 MB in the beginning and 97.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 133303.66 ms. Allocated memory was 153.1 MB in the beginning and 224.4 MB in the end (delta: 71.3 MB). Free memory was 97.4 MB in the beginning and 128.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. * Witness Printer took 4.40 ms. Allocated memory is still 224.4 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<20 [L15] COND FALSE !(!(cond)) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 133.2s, OverallIterations: 29, TraceHistogramMax: 5, AutomataDifference: 113.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 925 SDtfs, 2324 SDslu, 2758 SDs, 0 SdLazy, 3152 SolverSat, 632 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 65.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 923 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 51.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 297 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 830 NumberOfCodeBlocks, 782 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 802 ConstructedInterpolants, 1 QuantifiedInterpolants, 348769 SizeOfPredicates, 183 NumberOfNonLiveVariables, 3147 ConjunctsInSsa, 558 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 99/539 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...