/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/divbin2_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:33:36,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:33:36,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:33:36,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:33:36,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:33:36,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:33:36,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:33:36,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:33:36,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:33:36,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:33:36,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:33:36,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:33:36,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:33:36,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:33:36,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:33:36,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:33:36,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:33:36,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:33:36,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:33:36,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:33:36,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:33:36,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:33:36,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:33:36,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:33:36,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:33:36,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:33:36,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:33:36,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:33:36,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:33:36,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:33:36,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:33:36,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:33:36,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:33:36,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:33:36,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:33:36,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:33:36,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:33:36,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:33:36,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:33:36,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:33:36,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:33:36,770 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:33:36,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:33:36,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:33:36,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:33:36,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:33:36,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:33:36,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:33:36,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:33:36,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:33:36,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:33:36,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:33:36,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:33:36,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:33:36,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:33:36,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:33:36,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:33:36,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:33:36,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:33:36,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:33:36,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:33:36,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:33:36,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:33:37,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:33:37,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:33:37,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:33:37,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:33:37,206 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:33:37,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2020-12-23 07:33:37,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c62010432/85a7dbaf7b92470882ca8ecd4838071f/FLAGe68580e77 [2020-12-23 07:33:37,930 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:33:37,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound100.i [2020-12-23 07:33:37,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c62010432/85a7dbaf7b92470882ca8ecd4838071f/FLAGe68580e77 [2020-12-23 07:33:38,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c62010432/85a7dbaf7b92470882ca8ecd4838071f [2020-12-23 07:33:38,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:33:38,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:33:38,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:33:38,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:33:38,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:33:38,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3968b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38, skipping insertion in model container [2020-12-23 07:33:38,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:33:38,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:33:38,600 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/divbin2_valuebound100.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:33:38,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:33:38,628 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:33:38,644 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/divbin2_valuebound100.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:33:38,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:33:38,671 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:33:38,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38 WrapperNode [2020-12-23 07:33:38,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:33:38,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:33:38,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:33:38,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:33:38,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:33:38,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:33:38,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:33:38,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:33:38,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... [2020-12-23 07:33:38,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:33:38,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:33:38,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:33:38,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:33:38,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:33:38,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:33:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:33:38,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:33:38,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:33:39,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:33:39,247 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 07:33:39,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:39 BoogieIcfgContainer [2020-12-23 07:33:39,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:33:39,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:33:39,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:33:39,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:33:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:33:38" (1/3) ... [2020-12-23 07:33:39,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ce00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:33:39, skipping insertion in model container [2020-12-23 07:33:39,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:33:38" (2/3) ... [2020-12-23 07:33:39,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655ce00a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:33:39, skipping insertion in model container [2020-12-23 07:33:39,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:39" (3/3) ... [2020-12-23 07:33:39,262 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound100.i [2020-12-23 07:33:39,269 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:33:39,282 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:33:39,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:33:39,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:33:39,420 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:33:39,420 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:33:39,420 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:33:39,420 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:33:39,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:33:39,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:33:39,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:33:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:33:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 07:33:39,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:39,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:39,444 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2020-12-23 07:33:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:39,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171960798] [2020-12-23 07:33:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:39,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171960798] [2020-12-23 07:33:39,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:39,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:33:39,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609910533] [2020-12-23 07:33:39,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:33:39,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:39,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:33:39,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:33:39,643 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 07:33:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:39,660 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-12-23 07:33:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:33:39,661 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 07:33:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:39,671 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:33:39,671 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:33:39,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:33:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:33:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:33:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:33:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-23 07:33:39,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-12-23 07:33:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:39,709 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-23 07:33:39,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:33:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-23 07:33:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:33:39,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:39,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:39,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:33:39,711 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2020-12-23 07:33:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875739957] [2020-12-23 07:33:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:39,736 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:39,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573380486] [2020-12-23 07:33:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:33:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:40,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875739957] [2020-12-23 07:33:40,129 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573380486] [2020-12-23 07:33:40,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:40,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:33:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363342507] [2020-12-23 07:33:40,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:33:40,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:33:40,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:33:40,134 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-12-23 07:33:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:40,537 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-23 07:33:40,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:33:40,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 07:33:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:40,539 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:33:40,540 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:33:40,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:33:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:33:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-23 07:33:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:33:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 07:33:40,548 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2020-12-23 07:33:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:40,548 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 07:33:40,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:33:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 07:33:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:33:40,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:40,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:40,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:33:40,766 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2020-12-23 07:33:40,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:40,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120012139] [2020-12-23 07:33:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:40,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:40,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732677861] [2020-12-23 07:33:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:33:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:41,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120012139] [2020-12-23 07:33:41,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:41,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732677861] [2020-12-23 07:33:41,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:41,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:33:41,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305380909] [2020-12-23 07:33:41,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:33:41,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:33:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:33:41,080 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-12-23 07:33:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:41,448 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-23 07:33:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:33:41,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-23 07:33:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:41,451 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:33:41,452 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:33:41,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:33:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:33:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-23 07:33:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:33:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 07:33:41,467 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2020-12-23 07:33:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:41,468 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 07:33:41,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:33:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 07:33:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:33:41,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:41,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:41,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:41,688 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash -580289007, now seen corresponding path program 1 times [2020-12-23 07:33:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:41,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122966758] [2020-12-23 07:33:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:41,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:41,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134117615] [2020-12-23 07:33:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:33:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:41,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122966758] [2020-12-23 07:33:41,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:41,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134117615] [2020-12-23 07:33:41,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:41,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:33:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056845873] [2020-12-23 07:33:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:33:41,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:33:41,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:33:41,797 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-12-23 07:33:41,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:41,829 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-23 07:33:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:33:41,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 07:33:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:41,831 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:33:41,831 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:33:41,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:33:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:33:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:33:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:33:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 07:33:41,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2020-12-23 07:33:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:41,842 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 07:33:41,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:33:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 07:33:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:33:41,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:41,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:42,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:42,057 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash 505525932, now seen corresponding path program 1 times [2020-12-23 07:33:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:42,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112698447] [2020-12-23 07:33:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:42,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:42,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094726925] [2020-12-23 07:33:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:33:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:42,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112698447] [2020-12-23 07:33:42,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:42,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094726925] [2020-12-23 07:33:42,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:42,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:33:42,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153993861] [2020-12-23 07:33:42,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:33:42,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:33:42,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:33:42,330 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2020-12-23 07:33:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:42,797 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-12-23 07:33:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:33:42,798 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:33:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:42,799 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:33:42,799 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 07:33:42,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:33:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 07:33:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 07:33:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:33:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-23 07:33:42,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2020-12-23 07:33:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:42,806 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-23 07:33:42,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:33:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-23 07:33:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:33:42,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:42,807 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:43,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:43,009 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash 296629383, now seen corresponding path program 2 times [2020-12-23 07:33:43,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:43,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687608559] [2020-12-23 07:33:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:43,034 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:43,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462472589] [2020-12-23 07:33:43,037 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 [2020-12-23 07:33:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:33:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:33:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:43,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687608559] [2020-12-23 07:33:43,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:43,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462472589] [2020-12-23 07:33:43,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:43,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:33:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054059859] [2020-12-23 07:33:43,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:33:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:43,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:33:43,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:33:43,302 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 10 states. [2020-12-23 07:33:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:43,626 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-23 07:33:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:33:43,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 07:33:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:43,627 INFO L225 Difference]: With dead ends: 59 [2020-12-23 07:33:43,628 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 07:33:43,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:33:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 07:33:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-12-23 07:33:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:33:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-12-23 07:33:43,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 17 [2020-12-23 07:33:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:43,641 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-12-23 07:33:43,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:33:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-12-23 07:33:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:33:43,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:43,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:43,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:33:43,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1023135329, now seen corresponding path program 3 times [2020-12-23 07:33:43,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:43,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879213456] [2020-12-23 07:33:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:43,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:43,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715813650] [2020-12-23 07:33:43,859 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:43,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:33:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 07:33:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:44,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879213456] [2020-12-23 07:33:44,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:44,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715813650] [2020-12-23 07:33:44,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:44,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:33:44,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390735180] [2020-12-23 07:33:44,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:33:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:33:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:33:44,205 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-12-23 07:33:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:44,274 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 07:33:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:33:44,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:33:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:44,275 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:33:44,275 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:33:44,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:33:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:33:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:33:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:33:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-23 07:33:44,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 19 [2020-12-23 07:33:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:44,282 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-23 07:33:44,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:33:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-23 07:33:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:33:44,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:44,283 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:44,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:44,498 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1410508706, now seen corresponding path program 4 times [2020-12-23 07:33:44,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:44,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622056175] [2020-12-23 07:33:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:44,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:44,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40623004] [2020-12-23 07:33:44,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:44,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:33:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:33:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622056175] [2020-12-23 07:33:44,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:44,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40623004] [2020-12-23 07:33:44,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:44,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:33:44,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654014174] [2020-12-23 07:33:44,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:33:44,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:44,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:33:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:33:44,805 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 11 states. [2020-12-23 07:33:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:45,597 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-12-23 07:33:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 07:33:45,599 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-23 07:33:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:45,606 INFO L225 Difference]: With dead ends: 76 [2020-12-23 07:33:45,607 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 07:33:45,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:33:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 07:33:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 35. [2020-12-23 07:33:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:33:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-23 07:33:45,615 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 19 [2020-12-23 07:33:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-23 07:33:45,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:33:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-23 07:33:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:33:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:45,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:45,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:45,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:45,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2014308028, now seen corresponding path program 5 times [2020-12-23 07:33:45,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:45,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98240452] [2020-12-23 07:33:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:45,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:45,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713769206] [2020-12-23 07:33:45,855 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:46,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 07:33:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:46,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 07:33:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98240452] [2020-12-23 07:33:46,671 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713769206] [2020-12-23 07:33:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:46,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:33:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717944101] [2020-12-23 07:33:46,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:33:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:33:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:33:46,673 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 12 states. [2020-12-23 07:33:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:47,170 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-23 07:33:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:33:47,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-12-23 07:33:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:47,171 INFO L225 Difference]: With dead ends: 80 [2020-12-23 07:33:47,171 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:33:47,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:33:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:33:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-12-23 07:33:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:33:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 07:33:47,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 21 [2020-12-23 07:33:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:47,181 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 07:33:47,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:33:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 07:33:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:33:47,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:47,182 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:47,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:33:47,388 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:47,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1893285891, now seen corresponding path program 6 times [2020-12-23 07:33:47,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:47,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031460437] [2020-12-23 07:33:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:47,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:47,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139548306] [2020-12-23 07:33:47,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:47,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 07:33:47,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:47,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 07:33:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 07:33:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031460437] [2020-12-23 07:33:47,853 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139548306] [2020-12-23 07:33:47,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:47,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:33:47,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422042842] [2020-12-23 07:33:47,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:33:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:33:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:33:47,855 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2020-12-23 07:33:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:48,107 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-12-23 07:33:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:33:48,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 07:33:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:48,109 INFO L225 Difference]: With dead ends: 63 [2020-12-23 07:33:48,109 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 07:33:48,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:33:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 07:33:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-12-23 07:33:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 07:33:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-23 07:33:48,117 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 21 [2020-12-23 07:33:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:48,118 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-23 07:33:48,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:33:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-23 07:33:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:33:48,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:48,119 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:48,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:48,323 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:48,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1048532055, now seen corresponding path program 7 times [2020-12-23 07:33:48,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:48,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794588501] [2020-12-23 07:33:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:48,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:48,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666360732] [2020-12-23 07:33:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:33:50,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 07:33:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794588501] [2020-12-23 07:33:50,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666360732] [2020-12-23 07:33:50,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:50,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 07:33:50,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776752508] [2020-12-23 07:33:50,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:33:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:33:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:33:50,468 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 14 states. [2020-12-23 07:33:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:51,657 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-23 07:33:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:33:51,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-23 07:33:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:51,658 INFO L225 Difference]: With dead ends: 81 [2020-12-23 07:33:51,658 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 07:33:51,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:33:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 07:33:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2020-12-23 07:33:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:33:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 07:33:51,668 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2020-12-23 07:33:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:51,668 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 07:33:51,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:33:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 07:33:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:33:51,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:51,669 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:51,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:33:51,877 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1791789455, now seen corresponding path program 8 times [2020-12-23 07:33:51,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363309016] [2020-12-23 07:33:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:51,889 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:51,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944811029] [2020-12-23 07:33:51,890 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 [2020-12-23 07:33:52,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:33:52,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:33:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:33:52,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363309016] [2020-12-23 07:33:52,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:52,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944811029] [2020-12-23 07:33:52,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:33:52,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:33:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017049098] [2020-12-23 07:33:52,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:33:52,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:33:52,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:33:52,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:33:52,274 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2020-12-23 07:33:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:33:52,417 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-12-23 07:33:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:33:52,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 07:33:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:33:52,418 INFO L225 Difference]: With dead ends: 67 [2020-12-23 07:33:52,418 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:33:52,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:33:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:33:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 07:33:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 07:33:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-23 07:33:52,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2020-12-23 07:33:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:33:52,425 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-23 07:33:52,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:33:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-23 07:33:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:33:52,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:33:52,427 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:33:52,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:33:52,640 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:33:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:33:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash 650757938, now seen corresponding path program 9 times [2020-12-23 07:33:52,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:33:52,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074840408] [2020-12-23 07:33:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:33:52,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:33:52,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652695716] [2020-12-23 07:33:52,657 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 [2020-12-23 07:33:56,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 07:33:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:33:56,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 07:33:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:33:56,823 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-23 07:33:56,881 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:33:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074840408] [2020-12-23 07:33:57,003 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:33:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652695716] [2020-12-23 07:33:57,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 07:33:57,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:33:57,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:33:57,004 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:33:57,004 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:33:57,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:33:57,227 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:33:57,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:33:57 BoogieIcfgContainer [2020-12-23 07:33:57,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:33:57,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:33:57,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:33:57,229 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:33:57,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:33:39" (3/4) ... [2020-12-23 07:33:57,233 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:33:57,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:33:57,234 INFO L168 Benchmark]: Toolchain (without parser) took 18912.56 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.3 MB in the beginning and 146.8 MB in the end (delta: -15.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,235 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:33:57,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.77 ms. Allocated memory is still 155.2 MB. Free memory was 131.2 MB in the beginning and 121.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.07 ms. Allocated memory is still 155.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,236 INFO L168 Benchmark]: Boogie Preprocessor took 24.57 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,237 INFO L168 Benchmark]: RCFGBuilder took 507.53 ms. Allocated memory is still 155.2 MB. Free memory was 118.6 MB in the beginning and 105.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,238 INFO L168 Benchmark]: TraceAbstraction took 17975.54 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 105.4 MB in the beginning and 147.4 MB in the end (delta: -41.9 MB). Peak memory consumption was 74.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:33:57,238 INFO L168 Benchmark]: Witness Printer took 4.64 ms. Allocated memory is still 186.6 MB. Free memory was 147.4 MB in the beginning and 146.8 MB in the end (delta: 512.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:33:57,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.77 ms. Allocated memory is still 155.2 MB. Free memory was 131.2 MB in the beginning and 121.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.07 ms. Allocated memory is still 155.2 MB. Free memory was 121.2 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.57 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 507.53 ms. Allocated memory is still 155.2 MB. Free memory was 118.6 MB in the beginning and 105.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17975.54 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 105.4 MB in the beginning and 147.4 MB in the end (delta: -41.9 MB). Peak memory consumption was 74.1 MB. Max. memory is 8.0 GB. * Witness Printer took 4.64 ms. Allocated memory is still 186.6 MB. Free memory was 147.4 MB in the beginning and 146.8 MB in the end (delta: 512.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: 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: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND FALSE !(!cond) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND TRUE r >= b [L44] q = q + 1 [L45] r = r - b [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 17.7s, OverallIterations: 13, TraceHistogramMax: 5, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 449 SDslu, 464 SDs, 0 SdLazy, 1343 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 247 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=9, 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, 12 MinimizatonAttempts, 118 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 201 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 41805 SizeOfPredicates, 68 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 35/120 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...