/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:22:00,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:22:00,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:22:00,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:22:00,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:22:00,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:22:00,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:22:00,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:22:00,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:22:00,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:22:00,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:22:00,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:22:00,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:22:00,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:22:00,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:22:00,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:22:00,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:22:00,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:22:00,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:22:00,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:22:00,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:22:00,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:22:00,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:22:00,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:22:00,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:22:00,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:22:00,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:22:00,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:22:00,268 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 07:22:00,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:22:00,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:22:00,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:22:00,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:22:00,323 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:22:00,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:22:00,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:22:00,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:22:00,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:22:00,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:22:00,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:22:00,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:22:00,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:22:00,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:22:00,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:22:00,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:22:00,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:22:00,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:22:00,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:22:00,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:22:00,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:22:00,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:22:00,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:22:00,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:22:00,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:22:00,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:22:00,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:22:00,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:22:00,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:22:00,736 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:22:00,737 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:22:00,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-23 07:22:00,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/44c3eb1ac/6ee15892991b4953bba632887a7e32b4/FLAG43e5644b8 [2020-12-23 07:22:01,419 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:22:01,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2020-12-23 07:22:01,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/44c3eb1ac/6ee15892991b4953bba632887a7e32b4/FLAG43e5644b8 [2020-12-23 07:22:01,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/44c3eb1ac/6ee15892991b4953bba632887a7e32b4 [2020-12-23 07:22:01,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:22:01,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:22:01,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:22:01,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:22:01,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:22:01,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:22:01" (1/1) ... [2020-12-23 07:22:01,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63435f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:01, skipping insertion in model container [2020-12-23 07:22:01,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:22:01" (1/1) ... [2020-12-23 07:22:01,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:22:01,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:22:02,016 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2020-12-23 07:22:02,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:22:02,052 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:22:02,069 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2020-12-23 07:22:02,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:22:02,097 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:22:02,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02 WrapperNode [2020-12-23 07:22:02,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:22:02,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:22:02,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:22:02,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:22:02,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:22:02,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:22:02,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:22:02,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:22:02,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (1/1) ... [2020-12-23 07:22:02,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:22:02,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:22:02,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:22:02,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:22:02,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (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 07:22:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:22:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:22:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:22:02,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:22:02,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:22:02,597 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 07:22:02,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:22:02 BoogieIcfgContainer [2020-12-23 07:22:02,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:22:02,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:22:02,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:22:02,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:22:02,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:22:01" (1/3) ... [2020-12-23 07:22:02,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aaa178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:22:02, skipping insertion in model container [2020-12-23 07:22:02,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:22:02" (2/3) ... [2020-12-23 07:22:02,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aaa178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:22:02, skipping insertion in model container [2020-12-23 07:22:02,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:22:02" (3/3) ... [2020-12-23 07:22:02,610 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2020-12-23 07:22:02,618 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:22:02,623 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:22:02,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:22:02,713 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:22:02,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:22:02,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:22:02,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:22:02,718 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:22:02,718 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:22:02,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:22:02,718 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:22:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 07:22:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:22:02,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:02,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:02,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-23 07:22:02,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:02,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799316543] [2020-12-23 07:22:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:03,021 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 07:22:03,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799316543] [2020-12-23 07:22:03,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:22:03,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:22:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615355491] [2020-12-23 07:22:03,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:22:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:22:03,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:22:03,059 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 07:22:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:03,083 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 07:22:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:22:03,085 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 07:22:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:03,107 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:22:03,107 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:22:03,116 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 07:22:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:22:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:22:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:22:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-23 07:22:03,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2020-12-23 07:22:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:03,156 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-23 07:22:03,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:22:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-23 07:22:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:22:03,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:03,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:03,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:22:03,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-23 07:22:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:03,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254427282] [2020-12-23 07:22:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:03,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:03,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089276185] [2020-12-23 07:22:03,209 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 07:22:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:22:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:03,530 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 07:22:03,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254427282] [2020-12-23 07:22:03,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:03,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089276185] [2020-12-23 07:22:03,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:22:03,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:22:03,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752245055] [2020-12-23 07:22:03,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:22:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:22:03,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:22:03,536 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2020-12-23 07:22:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:03,757 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-23 07:22:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:22:03,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 07:22:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:03,760 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:22:03,760 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:22:03,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:22:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:22:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 07:22:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:22:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 07:22:03,769 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2020-12-23 07:22:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:03,770 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 07:22:03,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:22:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 07:22:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:22:03,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:03,772 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:03,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:22:03,986 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2020-12-23 07:22:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:03,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506498457] [2020-12-23 07:22:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:04,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:04,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254481758] [2020-12-23 07:22:04,009 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 07:22:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:22:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:04,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:22:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:22:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506498457] [2020-12-23 07:22:04,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:04,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254481758] [2020-12-23 07:22:04,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:22:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:22:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104543015] [2020-12-23 07:22:04,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:22:04,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:22:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:22:04,551 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-12-23 07:22:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:05,011 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-23 07:22:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:22:05,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 07:22:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:05,013 INFO L225 Difference]: With dead ends: 41 [2020-12-23 07:22:05,013 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:22:05,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:22:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:22:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 07:22:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:22:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 07:22:05,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-12-23 07:22:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:05,020 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 07:22:05,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:22:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 07:22:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:22:05,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:05,021 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:05,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:05,236 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:05,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2020-12-23 07:22:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:05,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242589255] [2020-12-23 07:22:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:05,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:05,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93765257] [2020-12-23 07:22:05,261 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 07:22:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:22:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:05,625 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 07:22:05,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242589255] [2020-12-23 07:22:05,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:05,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93765257] [2020-12-23 07:22:05,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:22:05,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:22:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444317195] [2020-12-23 07:22:05,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:22:05,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:22:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:22:05,634 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-12-23 07:22:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:06,203 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-23 07:22:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:22:06,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-23 07:22:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:06,205 INFO L225 Difference]: With dead ends: 34 [2020-12-23 07:22:06,205 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 07:22:06,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:22:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 07:22:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-23 07:22:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:22:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 07:22:06,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-12-23 07:22:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:06,212 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 07:22:06,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:22:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 07:22:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:22:06,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:06,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:06,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:06,429 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2020-12-23 07:22:06,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:06,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165347796] [2020-12-23 07:22:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:06,447 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:06,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101352504] [2020-12-23 07:22:06,449 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 07:22:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:22:06,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:06,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:22:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:22:06,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165347796] [2020-12-23 07:22:06,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:06,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101352504] [2020-12-23 07:22:06,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:22:06,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:22:06,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035541964] [2020-12-23 07:22:06,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:22:06,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:22:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:22:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:22:06,754 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-12-23 07:22:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:22:07,010 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-23 07:22:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:22:07,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-12-23 07:22:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:22:07,012 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:22:07,013 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 07:22:07,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:22:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 07:22:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-23 07:22:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 07:22:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 07:22:07,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2020-12-23 07:22:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:22:07,020 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 07:22:07,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:22:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 07:22:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:22:07,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:22:07,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:22:07,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:07,236 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:22:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:22:07,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 1 times [2020-12-23 07:22:07,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:22:07,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275491243] [2020-12-23 07:22:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:22:07,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:22:07,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739443944] [2020-12-23 07:22:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:22:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:22:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:22:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:22:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275491243] [2020-12-23 07:22:07,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:22:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739443944] [2020-12-23 07:22:07,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:22:07,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:22:07,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:22:07,626 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:22:07,626 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:22:07,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:22:07,863 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:22:07,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:22:07 BoogieIcfgContainer [2020-12-23 07:22:07,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:22:07,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:22:07,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:22:07,865 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:22:07,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:22:02" (3/4) ... [2020-12-23 07:22:07,869 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:22:07,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:22:07,871 INFO L168 Benchmark]: Toolchain (without parser) took 6049.90 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 145.5 MB in the beginning and 85.6 MB in the end (delta: 59.9 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,872 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 169.9 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:07,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.19 ms. Allocated memory is still 169.9 MB. Free memory was 145.0 MB in the beginning and 134.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.81 ms. Allocated memory is still 169.9 MB. Free memory was 134.5 MB in the beginning and 132.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,874 INFO L168 Benchmark]: Boogie Preprocessor took 28.06 ms. Allocated memory is still 169.9 MB. Free memory was 132.9 MB in the beginning and 131.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,875 INFO L168 Benchmark]: RCFGBuilder took 429.64 ms. Allocated memory is still 169.9 MB. Free memory was 131.9 MB in the beginning and 117.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,876 INFO L168 Benchmark]: TraceAbstraction took 5262.65 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 117.7 MB in the beginning and 86.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 75.2 MB. Max. memory is 8.0 GB. [2020-12-23 07:22:07,876 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 211.8 MB. Free memory was 86.1 MB in the beginning and 85.6 MB in the end (delta: 512.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:22:07,881 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 169.9 MB. Free memory is still 143.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.19 ms. Allocated memory is still 169.9 MB. Free memory was 145.0 MB in the beginning and 134.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.81 ms. Allocated memory is still 169.9 MB. Free memory was 134.5 MB in the beginning and 132.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.06 ms. Allocated memory is still 169.9 MB. Free memory was 132.9 MB in the beginning and 131.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.64 ms. Allocated memory is still 169.9 MB. Free memory was 131.9 MB in the beginning and 117.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5262.65 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 117.7 MB in the beginning and 86.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 75.2 MB. Max. memory is 8.0 GB. * Witness Printer took 4.78 ms. Allocated memory is still 211.8 MB. Free memory was 86.1 MB in the beginning and 85.6 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: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L26] Y = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND TRUE v < 0 [L41] v = v + (long long) 2 * Y [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 5.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 212 SDslu, 104 SDs, 0 SdLazy, 268 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 5 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 10384 SizeOfPredicates, 48 NumberOfNonLiveVariables, 323 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/7 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...