/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/bresenham-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:16:20,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:16:20,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:16:21,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:16:21,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:16:21,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:16:21,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:16:21,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:16:21,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:16:21,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:16:21,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:16:21,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:16:21,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:16:21,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:16:21,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:16:21,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:16:21,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:16:21,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:16:21,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:16:21,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:16:21,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:16:21,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:16:21,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:16:21,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:16:21,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:16:21,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:16:21,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:16:21,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:16:21,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:16:21,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:16:21,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:16:21,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:16:21,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:16:21,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:16:21,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:16:21,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:16:21,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:16:21,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:16:21,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:16:21,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:16:21,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:16:21,189 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:16:21,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:16:21,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:16:21,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:16:21,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:16:21,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:16:21,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:16:21,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:16:21,191 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:16:21,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:16:21,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:16:21,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:16:21,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:16:21,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:16:21,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:16:21,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:16:21,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:16:21,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:16:21,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:16:21,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:16:21,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:16:21,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:16:21,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:16:21,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:16:21,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:16:21,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:16:21,585 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:16:21,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-01-06 17:16:21,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf51f2224/5fe1b60a96a540caa0f10c23764d6362/FLAG2c749584d [2021-01-06 17:16:22,245 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:16:22,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-01-06 17:16:22,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf51f2224/5fe1b60a96a540caa0f10c23764d6362/FLAG2c749584d [2021-01-06 17:16:22,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf51f2224/5fe1b60a96a540caa0f10c23764d6362 [2021-01-06 17:16:22,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:16:22,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:16:22,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:22,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:16:22,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:16:22,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ee5568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22, skipping insertion in model container [2021-01-06 17:16:22,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:16:22,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:16:22,809 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/bresenham-ll_valuebound10.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:16:22,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:22,850 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:16:22,861 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/bresenham-ll_valuebound10.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:16:22,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:22,887 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:16:22,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22 WrapperNode [2021-01-06 17:16:22,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:22,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:22,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:16:22,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:16:22,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:22,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:16:22,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:16:22,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:16:22,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (1/1) ... [2021-01-06 17:16:22,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:16:22,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:16:22,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:16:22,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:16:22,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (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 [2021-01-06 17:16:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:16:23,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:16:23,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:16:23,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:16:23,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:16:23,349 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:16:23,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:23 BoogieIcfgContainer [2021-01-06 17:16:23,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:16:23,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:16:23,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:16:23,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:16:23,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:16:22" (1/3) ... [2021-01-06 17:16:23,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abb0651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:23, skipping insertion in model container [2021-01-06 17:16:23,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:22" (2/3) ... [2021-01-06 17:16:23,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abb0651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:23, skipping insertion in model container [2021-01-06 17:16:23,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:23" (3/3) ... [2021-01-06 17:16:23,370 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2021-01-06 17:16:23,392 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:16:23,406 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:16:23,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:16:23,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:16:23,493 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:16:23,493 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:16:23,493 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:16:23,493 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:16:23,494 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:16:23,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:16:23,494 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:16:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:16:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:23,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:23,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:23,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 17:16:23,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:23,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699153934] [2021-01-06 17:16:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:23,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699153934] [2021-01-06 17:16:23,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:23,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:16:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951580625] [2021-01-06 17:16:23,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:16:23,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:16:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:16:23,739 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:16:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:23,759 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-01-06 17:16:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:16:23,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 17:16:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:23,771 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:16:23,771 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:16:23,779 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 [2021-01-06 17:16:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:16:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:16:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:16:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:16:23,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-01-06 17:16:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:23,821 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:16:23,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:16:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:16:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:23,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:23,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:23,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:16:23,824 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 17:16:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:23,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160313385] [2021-01-06 17:16:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:23,864 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:23,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408350242] [2021-01-06 17:16:23,865 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 [2021-01-06 17:16:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:16:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:24,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160313385] [2021-01-06 17:16:24,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:24,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408350242] [2021-01-06 17:16:24,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:24,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:16:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101113271] [2021-01-06 17:16:24,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:16:24,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:16:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:24,132 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-01-06 17:16:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:24,260 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 17:16:24,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:24,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:16:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:24,262 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:16:24,262 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:16:24,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:16:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:16:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-01-06 17:16:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:16:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 17:16:24,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-01-06 17:16:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:24,270 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 17:16:24,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:16:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 17:16:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:24,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:24,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:24,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:16:24,486 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-01-06 17:16:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:24,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670913136] [2021-01-06 17:16:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:24,511 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:24,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516635249] [2021-01-06 17:16:24,511 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 [2021-01-06 17:16:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:16:24,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:24,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670913136] [2021-01-06 17:16:24,720 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:24,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516635249] [2021-01-06 17:16:24,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:24,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139831177] [2021-01-06 17:16:24,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:24,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:24,723 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2021-01-06 17:16:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:24,926 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-01-06 17:16:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:16:24,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:24,928 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:16:24,928 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:16:24,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:16:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:16:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:24,938 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-01-06 17:16:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:24,939 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:24,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:24,941 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:24,942 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:25,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:25,157 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:25,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-01-06 17:16:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:25,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174963970] [2021-01-06 17:16:25,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:25,176 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:25,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617661194] [2021-01-06 17:16:25,177 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 [2021-01-06 17:16:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:16:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:25,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174963970] [2021-01-06 17:16:25,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:25,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617661194] [2021-01-06 17:16:25,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:25,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291234983] [2021-01-06 17:16:25,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:25,368 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2021-01-06 17:16:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:25,543 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-01-06 17:16:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:25,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:25,545 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:16:25,545 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:16:25,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:16:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-01-06 17:16:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:16:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:16:25,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-01-06 17:16:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:25,553 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:16:25,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:16:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:16:25,554 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:25,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:25,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:25,771 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-01-06 17:16:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:25,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34270967] [2021-01-06 17:16:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:25,807 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:25,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947076187] [2021-01-06 17:16:25,808 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 [2021-01-06 17:16:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:16:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:26,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:26,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34270967] [2021-01-06 17:16:26,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:26,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947076187] [2021-01-06 17:16:26,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:26,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643059024] [2021-01-06 17:16:26,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:26,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:26,150 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2021-01-06 17:16:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:26,409 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-06 17:16:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:26,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2021-01-06 17:16:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:26,411 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:16:26,411 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:16:26,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:16:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-01-06 17:16:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:26,418 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:16:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:26,418 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:26,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:26,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:26,419 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:26,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:26,636 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-01-06 17:16:26,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:26,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602538894] [2021-01-06 17:16:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:26,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:26,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349884688] [2021-01-06 17:16:26,656 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 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 [2021-01-06 17:16:26,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:16:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602538894] [2021-01-06 17:16:26,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349884688] [2021-01-06 17:16:26,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:26,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:26,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460851946] [2021-01-06 17:16:26,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:26,967 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2021-01-06 17:16:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:27,255 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:27,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:27,257 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:27,257 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:16:27,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:16:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:16:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 17:16:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:16:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:16:27,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-01-06 17:16:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:27,264 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:16:27,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:16:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:27,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:27,265 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:27,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:16:27,481 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-01-06 17:16:27,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:27,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113871289] [2021-01-06 17:16:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:27,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401294813] [2021-01-06 17:16:27,509 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 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 [2021-01-06 17:16:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:16:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113871289] [2021-01-06 17:16:27,821 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401294813] [2021-01-06 17:16:27,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:27,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845829772] [2021-01-06 17:16:27,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:27,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:27,823 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2021-01-06 17:16:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:28,106 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:28,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2021-01-06 17:16:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:28,111 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:28,111 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:16:28,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:16:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-01-06 17:16:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:28,128 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:28,129 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:28,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:28,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:28,130 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:28,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:28,345 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:28,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:28,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-01-06 17:16:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:28,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279771678] [2021-01-06 17:16:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:28,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:28,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551576897] [2021-01-06 17:16:28,365 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 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 [2021-01-06 17:16:28,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:28,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:16:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279771678] [2021-01-06 17:16:28,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551576897] [2021-01-06 17:16:28,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:28,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433305166] [2021-01-06 17:16:28,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:28,535 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2021-01-06 17:16:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:32,656 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-01-06 17:16:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:32,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 17:16:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:32,658 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:16:32,658 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:16:32,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:16:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-01-06 17:16:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:32,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:32,666 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:32,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:32,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:32,667 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:32,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:32,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:32,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:32,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-01-06 17:16:32,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:32,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751356118] [2021-01-06 17:16:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:32,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:32,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160960656] [2021-01-06 17:16:32,895 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 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 [2021-01-06 17:16:32,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:32,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:16:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751356118] [2021-01-06 17:16:33,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:33,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160960656] [2021-01-06 17:16:33,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:33,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912442373] [2021-01-06 17:16:33,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:33,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:33,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:33,141 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2021-01-06 17:16:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:33,435 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 17:16:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:33,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:33,436 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:16:33,436 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:16:33,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:16:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-01-06 17:16:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:33,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 19 [2021-01-06 17:16:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:33,446 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:33,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:33,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:33,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:33,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:16:33,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1998111260, now seen corresponding path program 1 times [2021-01-06 17:16:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:33,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743539426] [2021-01-06 17:16:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:33,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:33,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814355041] [2021-01-06 17:16:33,687 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 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 [2021-01-06 17:16:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:16:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743539426] [2021-01-06 17:16:33,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814355041] [2021-01-06 17:16:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:33,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951551087] [2021-01-06 17:16:33,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:33,882 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-01-06 17:16:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:33,980 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:33,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:16:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:33,981 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:33,981 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:33,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:33,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:33,991 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:33,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:33,992 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:33,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:34,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:34,200 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 2 times [2021-01-06 17:16:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:34,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567094347] [2021-01-06 17:16:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:34,211 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:34,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392057426] [2021-01-06 17:16:34,212 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 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 [2021-01-06 17:16:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:16:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567094347] [2021-01-06 17:16:34,492 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392057426] [2021-01-06 17:16:34,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:34,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:34,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908182383] [2021-01-06 17:16:34,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:34,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:34,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:34,494 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-01-06 17:16:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:34,646 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:34,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 17:16:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:34,648 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:34,648 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:34,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:34,658 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:34,658 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:34,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:34,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:34,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:34,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:34,874 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-01-06 17:16:34,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:34,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502959903] [2021-01-06 17:16:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:34,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:34,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518874041] [2021-01-06 17:16:34,886 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 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 [2021-01-06 17:16:35,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:35,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:35,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:35,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502959903] [2021-01-06 17:16:35,319 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:35,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518874041] [2021-01-06 17:16:35,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:35,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 17:16:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399573017] [2021-01-06 17:16:35,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:16:35,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:16:35,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:16:35,322 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2021-01-06 17:16:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:35,656 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 17:16:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:16:35,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2021-01-06 17:16:35,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:35,657 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:16:35,658 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:16:35,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:16:35,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:16:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:16:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:35,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2021-01-06 17:16:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:35,666 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:35,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:16:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:35,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:35,668 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:35,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:16:35,876 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:35,876 INFO L82 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2021-01-06 17:16:35,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:35,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856865610] [2021-01-06 17:16:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:35,898 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:35,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639827806] [2021-01-06 17:16:35,902 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 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 [2021-01-06 17:16:35,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:16:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:16:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856865610] [2021-01-06 17:16:36,157 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639827806] [2021-01-06 17:16:36,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:36,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765077969] [2021-01-06 17:16:36,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:36,159 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2021-01-06 17:16:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:36,417 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-01-06 17:16:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:36,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 17:16:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:36,418 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:16:36,418 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:16:36,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:16:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-01-06 17:16:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:16:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-01-06 17:16:36,454 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2021-01-06 17:16:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:36,455 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-01-06 17:16:36,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-01-06 17:16:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:36,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:36,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:36,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:16:36,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:36,675 INFO L82 PathProgramCache]: Analyzing trace with hash 386019294, now seen corresponding path program 4 times [2021-01-06 17:16:36,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:36,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679451694] [2021-01-06 17:16:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:36,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:36,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379135456] [2021-01-06 17:16:36,685 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 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 [2021-01-06 17:16:36,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:16:36,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:36,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:16:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:36,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679451694] [2021-01-06 17:16:36,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:36,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379135456] [2021-01-06 17:16:36,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:16:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606421321] [2021-01-06 17:16:36,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:16:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:16:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:16:36,796 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2021-01-06 17:16:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:36,889 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-01-06 17:16:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:16:36,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 17:16:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:36,890 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:16:36,891 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 17:16:36,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 17:16:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-01-06 17:16:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:16:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-01-06 17:16:36,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 24 [2021-01-06 17:16:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:36,914 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-01-06 17:16:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:16:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-01-06 17:16:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:36,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:36,923 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:37,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:16:37,139 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 5 times [2021-01-06 17:16:37,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:37,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308277471] [2021-01-06 17:16:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:37,150 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:37,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456530192] [2021-01-06 17:16:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 17:16:37,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:16:37,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:16:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308277471] [2021-01-06 17:16:37,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456530192] [2021-01-06 17:16:37,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:37,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11910470] [2021-01-06 17:16:37,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:37,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:37,387 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 10 states. [2021-01-06 17:16:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:37,700 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-01-06 17:16:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:16:37,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 17:16:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:37,703 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:16:37,703 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:16:37,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:16:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-01-06 17:16:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 17:16:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-01-06 17:16:37,729 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 24 [2021-01-06 17:16:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:37,729 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-01-06 17:16:37,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-01-06 17:16:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:37,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:37,730 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:37,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:37,935 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:37,936 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-01-06 17:16:37,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:37,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087990182] [2021-01-06 17:16:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:37,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:37,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869811001] [2021-01-06 17:16:37,946 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 [2021-01-06 17:16:41,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:16:41,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:16:41,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:41,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087990182] [2021-01-06 17:16:41,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:41,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869811001] [2021-01-06 17:16:41,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:16:41,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:41,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:16:41,847 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:16:41,847 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:16:42,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:16:42,077 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:16:42,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:16:42 BoogieIcfgContainer [2021-01-06 17:16:42,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:16:42,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:16:42,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:16:42,079 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:16:42,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:23" (3/4) ... [2021-01-06 17:16:42,083 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:16:42,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:16:42,085 INFO L168 Benchmark]: Toolchain (without parser) took 19454.56 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.5 MB in the beginning and 149.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 45.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,086 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:42,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.34 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.16 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,087 INFO L168 Benchmark]: Boogie Preprocessor took 25.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 113.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,087 INFO L168 Benchmark]: RCFGBuilder took 397.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 133.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,088 INFO L168 Benchmark]: TraceAbstraction took 18724.30 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.7 MB in the beginning and 150.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 49.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,088 INFO L168 Benchmark]: Witness Printer took 4.70 ms. Allocated memory is still 218.1 MB. Free memory was 150.4 MB in the beginning and 149.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:42,091 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 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.34 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.3 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 38.16 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 113.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 397.60 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 133.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18724.30 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.7 MB in the beginning and 150.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 49.4 MB. Max. memory is 8.0 GB. * Witness Printer took 4.70 ms. Allocated memory is still 218.1 MB. Free memory was 150.4 MB in the beginning and 149.8 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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 X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L26] Y = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 18.5s, OverallIterations: 16, TraceHistogramMax: 4, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 188 SDtfs, 299 SDslu, 645 SDs, 0 SdLazy, 1608 SolverSat, 145 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 130 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 277 NumberOfCodeBlocks, 269 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 56407 SizeOfPredicates, 160 NumberOfNonLiveVariables, 1324 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 29/139 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...