/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_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:27:43,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:27:43,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:27:43,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:27:43,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:27:43,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:27:43,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:27:44,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:27:44,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:27:44,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:27:44,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:27:44,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:27:44,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:27:44,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:27:44,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:27:44,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:27:44,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:27:44,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:27:44,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:27:44,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:27:44,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:27:44,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:27:44,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:27:44,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:27:44,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:27:44,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:27:44,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:27:44,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:27:44,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:27:44,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:27:44,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:27:44,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:27:44,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:27:44,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:27:44,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:27:44,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:27:44,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:27:44,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:27:44,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:27:44,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:27:44,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:27:44,136 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:27:44,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:27:44,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:27:44,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:27:44,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:27:44,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:27:44,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:27:44,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:27:44,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:27:44,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:27:44,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:27:44,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:27:44,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:27:44,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:27:44,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:27:44,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:27:44,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:27:44,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:27:44,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:27:44,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:27:44,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:27:44,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:27:44,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:27:44,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:27:44,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:27:44,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:27:44,613 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:27:44,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2021-01-06 17:27:44,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/629719d62/7e4046f1d5ae476dbc8c4121574a037d/FLAG4bf1c786e [2021-01-06 17:27:45,383 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:27:45,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2021-01-06 17:27:45,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/629719d62/7e4046f1d5ae476dbc8c4121574a037d/FLAG4bf1c786e [2021-01-06 17:27:45,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/629719d62/7e4046f1d5ae476dbc8c4121574a037d [2021-01-06 17:27:45,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:27:45,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:27:45,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:27:45,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:27:45,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:27:45,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:27:45" (1/1) ... [2021-01-06 17:27:45,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6835a4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:45, skipping insertion in model container [2021-01-06 17:27:45,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:27:45" (1/1) ... [2021-01-06 17:27:45,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:27:45,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:27:46,029 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_valuebound2.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,] [2021-01-06 17:27:46,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:27:46,064 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:27:46,084 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_valuebound2.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,] [2021-01-06 17:27:46,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:27:46,126 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:27:46,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46 WrapperNode [2021-01-06 17:27:46,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:27:46,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:27:46,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:27:46,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:27:46,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:27:46,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:27:46,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:27:46,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:27:46,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... [2021-01-06 17:27:46,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:27:46,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:27:46,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:27:46,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:27:46,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:27:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:27:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:27:46,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:27:46,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:27:46,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:27:46,546 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 17:27:46,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:46 BoogieIcfgContainer [2021-01-06 17:27:46,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:27:46,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:27:46,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:27:46,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:27:46,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:27:45" (1/3) ... [2021-01-06 17:27:46,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244de6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:27:46, skipping insertion in model container [2021-01-06 17:27:46,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:27:46" (2/3) ... [2021-01-06 17:27:46,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244de6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:27:46, skipping insertion in model container [2021-01-06 17:27:46,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:46" (3/3) ... [2021-01-06 17:27:46,556 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2021-01-06 17:27:46,563 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:27:46,567 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:27:46,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:27:46,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:27:46,654 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:27:46,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:27:46,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:27:46,655 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:27:46,655 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:27:46,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:27:46,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:27:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:27:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:27:46,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:46,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:46,680 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:46,688 INFO L82 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2021-01-06 17:27:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:46,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573059055] [2021-01-06 17:27:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:46,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573059055] [2021-01-06 17:27:46,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:46,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:27:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244218385] [2021-01-06 17:27:46,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:27:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:46,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:27:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:27:46,895 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:27:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:46,912 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2021-01-06 17:27:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:27:46,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 17:27:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:46,923 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:27:46,923 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:27:46,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:27:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:27:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:27:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:27:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 17:27:46,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-01-06 17:27:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:46,963 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 17:27:46,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:27:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 17:27:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:27:46,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:46,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:46,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:27:46,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2021-01-06 17:27:46,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:46,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403314226] [2021-01-06 17:27:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:46,996 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:46,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890092693] [2021-01-06 17:27:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:47,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:27:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403314226] [2021-01-06 17:27:47,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890092693] [2021-01-06 17:27:47,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:47,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:27:47,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112439929] [2021-01-06 17:27:47,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:27:47,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:27:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:47,314 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2021-01-06 17:27:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:47,643 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-01-06 17:27:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:27:47,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 17:27:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:47,646 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:27:47,647 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:27:47,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:27:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-01-06 17:27:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:27:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-01-06 17:27:47,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2021-01-06 17:27:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:47,668 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-01-06 17:27:47,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:27:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-01-06 17:27:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:27:47,670 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:47,670 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:47,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:27:47,884 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2021-01-06 17:27:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:47,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539687404] [2021-01-06 17:27:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:47,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047234614] [2021-01-06 17:27:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:47,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:27:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:48,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539687404] [2021-01-06 17:27:48,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:48,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047234614] [2021-01-06 17:27:48,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:27:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853105577] [2021-01-06 17:27:48,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:27:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:27:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:48,180 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2021-01-06 17:27:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:48,463 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-01-06 17:27:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:27:48,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-06 17:27:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:48,464 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:27:48,464 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:27:48,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:27:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:27:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:27:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:27:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 17:27:48,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-01-06 17:27:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:48,472 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 17:27:48,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:27:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 17:27:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:27:48,473 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:48,473 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:48,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:48,688 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:48,690 INFO L82 PathProgramCache]: Analyzing trace with hash -580289007, now seen corresponding path program 1 times [2021-01-06 17:27:48,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:48,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837751616] [2021-01-06 17:27:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:48,705 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:48,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725651754] [2021-01-06 17:27:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:27:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:48,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837751616] [2021-01-06 17:27:48,777 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725651754] [2021-01-06 17:27:48,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:48,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:27:48,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720674525] [2021-01-06 17:27:48,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:27:48,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:27:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:27:48,780 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2021-01-06 17:27:48,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:48,806 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 17:27:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:27:48,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 17:27:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:48,808 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:27:48,808 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:27:48,809 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 [2021-01-06 17:27:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:27:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 17:27:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:27:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 17:27:48,813 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2021-01-06 17:27:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:48,813 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 17:27:48,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:27:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 17:27:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:27:48,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:48,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:49,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:49,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 505525932, now seen corresponding path program 1 times [2021-01-06 17:27:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:49,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518542862] [2021-01-06 17:27:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:49,046 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:49,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091184795] [2021-01-06 17:27:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:49,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:27:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518542862] [2021-01-06 17:27:49,347 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:49,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091184795] [2021-01-06 17:27:49,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:49,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:27:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75300489] [2021-01-06 17:27:49,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:27:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:27:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:27:49,351 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2021-01-06 17:27:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:49,814 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-06 17:27:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:27:49,815 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:27:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:49,816 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:27:49,816 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:27:49,817 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 [2021-01-06 17:27:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:27:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-01-06 17:27:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:27:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 17:27:49,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2021-01-06 17:27:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:49,823 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 17:27:49,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:27:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 17:27:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:27:49,824 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:49,824 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:50,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:50,031 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 296629383, now seen corresponding path program 2 times [2021-01-06 17:27:50,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:50,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636657272] [2021-01-06 17:27:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:50,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:50,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315664447] [2021-01-06 17:27:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:50,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:27:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:27:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:27:50,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636657272] [2021-01-06 17:27:50,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315664447] [2021-01-06 17:27:50,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:50,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:27:50,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376857893] [2021-01-06 17:27:50,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:27:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:50,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:27:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:27:50,362 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2021-01-06 17:27:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:50,587 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-01-06 17:27:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:27:50,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 17:27:50,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:50,589 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:27:50,589 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:27:50,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:27:50,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:27:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-01-06 17:27:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:27:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 17:27:50,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-01-06 17:27:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:50,596 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 17:27:50,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:27:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 17:27:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:27:50,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:50,597 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:50,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:27:50,812 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1023135329, now seen corresponding path program 3 times [2021-01-06 17:27:50,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:50,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705491722] [2021-01-06 17:27:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:50,830 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:50,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552003044] [2021-01-06 17:27:50,831 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 [2021-01-06 17:27:50,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:27:50,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:50,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:27:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:51,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705491722] [2021-01-06 17:27:51,084 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:51,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552003044] [2021-01-06 17:27:51,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:51,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:27:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121971047] [2021-01-06 17:27:51,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:27:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:27:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:51,086 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2021-01-06 17:27:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:51,153 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-01-06 17:27:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:51,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 17:27:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:51,155 INFO L225 Difference]: With dead ends: 51 [2021-01-06 17:27:51,155 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:27:51,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:27:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 17:27:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:27:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 17:27:51,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-01-06 17:27:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:51,160 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 17:27:51,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:27:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 17:27:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:27:51,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:51,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:51,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:51,375 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2014308028, now seen corresponding path program 4 times [2021-01-06 17:27:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:51,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571171484] [2021-01-06 17:27:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:51,391 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:51,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527036107] [2021-01-06 17:27:51,392 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 [2021-01-06 17:27:51,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:27:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:27:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571171484] [2021-01-06 17:27:51,759 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:51,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527036107] [2021-01-06 17:27:51,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:51,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:27:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732219443] [2021-01-06 17:27:51,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:27:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:27:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:27:51,762 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2021-01-06 17:27:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:52,138 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-01-06 17:27:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:27:52,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 17:27:52,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:52,141 INFO L225 Difference]: With dead ends: 56 [2021-01-06 17:27:52,141 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:27:52,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:27:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:27:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 17:27:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:27:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2021-01-06 17:27:52,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 21 [2021-01-06 17:27:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:52,146 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2021-01-06 17:27:52,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:27:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2021-01-06 17:27:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:27:52,147 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:52,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:52,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:52,362 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2014367610, now seen corresponding path program 1 times [2021-01-06 17:27:52,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:52,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568556609] [2021-01-06 17:27:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:52,382 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:52,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254386086] [2021-01-06 17:27:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:27:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:53,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2021-01-06 17:27:53,554 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:53,998 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:55,028 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:56,236 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:58,185 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:27:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568556609] [2021-01-06 17:27:58,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254386086] [2021-01-06 17:27:58,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:27:58,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:27:58,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:27:58,787 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:27:58,787 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:27:58,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:27:59,018 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:27:59,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:27:59 BoogieIcfgContainer [2021-01-06 17:27:59,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:27:59,019 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:27:59,019 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:27:59,019 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:27:59,020 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:27:46" (3/4) ... [2021-01-06 17:27:59,023 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:27:59,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:27:59,026 INFO L168 Benchmark]: Toolchain (without parser) took 13278.27 ms. Allocated memory was 162.5 MB in the beginning and 421.5 MB in the end (delta: 259.0 MB). Free memory was 136.9 MB in the beginning and 200.6 MB in the end (delta: -63.7 MB). Peak memory consumption was 196.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,026 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:27:59,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.82 ms. Allocated memory is still 162.5 MB. Free memory was 136.6 MB in the beginning and 126.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,029 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.36 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 125.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,036 INFO L168 Benchmark]: Boogie Preprocessor took 24.63 ms. Allocated memory is still 162.5 MB. Free memory was 125.3 MB in the beginning and 124.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,038 INFO L168 Benchmark]: RCFGBuilder took 351.13 ms. Allocated memory is still 162.5 MB. Free memory was 124.1 MB in the beginning and 111.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,039 INFO L168 Benchmark]: TraceAbstraction took 12469.06 ms. Allocated memory was 162.5 MB in the beginning and 421.5 MB in the end (delta: 259.0 MB). Free memory was 110.8 MB in the beginning and 201.1 MB in the end (delta: -90.3 MB). Peak memory consumption was 182.3 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,040 INFO L168 Benchmark]: Witness Printer took 4.96 ms. Allocated memory is still 421.5 MB. Free memory was 201.1 MB in the beginning and 200.6 MB in the end (delta: 526.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:59,046 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 162.5 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 378.82 ms. Allocated memory is still 162.5 MB. Free memory was 136.6 MB in the beginning and 126.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.36 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 125.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.63 ms. Allocated memory is still 162.5 MB. Free memory was 125.3 MB in the beginning and 124.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.13 ms. Allocated memory is still 162.5 MB. Free memory was 124.1 MB in the beginning and 111.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12469.06 ms. Allocated memory was 162.5 MB in the beginning and 421.5 MB in the end (delta: 259.0 MB). Free memory was 110.8 MB in the beginning and 201.1 MB in the end (delta: -90.3 MB). Peak memory consumption was 182.3 MB. Max. memory is 8.0 GB. * Witness Printer took 4.96 ms. Allocated memory is still 421.5 MB. Free memory was 201.1 MB in the beginning and 200.6 MB in the end (delta: 526.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 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 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 FALSE !(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: 12.3s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 302 SDslu, 183 SDs, 0 SdLazy, 380 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 16709 SizeOfPredicates, 39 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 17/40 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...