/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/geo3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:51:13,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:51:13,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:51:13,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:51:13,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:51:13,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:51:13,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:51:13,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:51:13,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:51:13,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:51:13,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:51:13,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:51:13,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:51:13,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:51:13,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:51:13,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:51:13,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:51:13,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:51:13,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:51:13,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:51:13,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:51:13,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:51:13,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:51:13,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:51:13,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:51:13,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:51:13,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:51:13,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:51:13,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:51:13,293 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:51:13,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:51:13,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:51:13,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:51:13,299 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:51:13,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:51:13,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:51:13,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:51:13,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:51:13,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:51:13,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:51:13,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:51:13,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:51:13,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:51:13,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:51:13,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:51:13,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:51:13,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:51:13,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:51:13,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:51:13,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:51:13,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:51:13,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:51:13,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:51:13,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:51:13,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:51:13,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:51:13,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:51:13,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:51:13,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:51:13,775 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:51:13,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound50.c [2020-12-23 07:51:13,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95cf5c69e/8a62fa1137f649d9b20ab2989f4ed5f9/FLAG308396ec9 [2020-12-23 07:51:14,501 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:51:14,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo3-ll_valuebound50.c [2020-12-23 07:51:14,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95cf5c69e/8a62fa1137f649d9b20ab2989f4ed5f9/FLAG308396ec9 [2020-12-23 07:51:14,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95cf5c69e/8a62fa1137f649d9b20ab2989f4ed5f9 [2020-12-23 07:51:14,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:51:14,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:51:14,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:51:14,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:51:14,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:51:14,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:51:14" (1/1) ... [2020-12-23 07:51:14,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f88ed4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:14, skipping insertion in model container [2020-12-23 07:51:14,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:51:14" (1/1) ... [2020-12-23 07:51:14,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:51:14,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:51:15,084 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/geo3-ll_valuebound50.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~az~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:51:15,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:51:15,114 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:51:15,129 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/geo3-ll_valuebound50.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~az~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:51:15,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:51:15,158 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:51:15,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15 WrapperNode [2020-12-23 07:51:15,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:51:15,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:51:15,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:51:15,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:51:15,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:51:15,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:51:15,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:51:15,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:51:15,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... [2020-12-23 07:51:15,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:51:15,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:51:15,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:51:15,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:51:15,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:51:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:51:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:51:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:51:15,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:51:15,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:51:15,718 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 07:51:15,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:51:15 BoogieIcfgContainer [2020-12-23 07:51:15,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:51:15,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:51:15,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:51:15,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:51:15,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:51:14" (1/3) ... [2020-12-23 07:51:15,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3b59a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:51:15, skipping insertion in model container [2020-12-23 07:51:15,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:51:15" (2/3) ... [2020-12-23 07:51:15,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3b59a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:51:15, skipping insertion in model container [2020-12-23 07:51:15,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:51:15" (3/3) ... [2020-12-23 07:51:15,733 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound50.c [2020-12-23 07:51:15,749 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:51:15,761 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:51:15,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:51:15,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:51:15,842 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:51:15,842 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:51:15,842 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:51:15,842 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:51:15,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:51:15,843 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:51:15,843 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:51:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 07:51:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:51:15,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:15,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:15,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2020-12-23 07:51:15,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:15,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341445867] [2020-12-23 07:51:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:16,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341445867] [2020-12-23 07:51:16,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:16,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:51:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772399323] [2020-12-23 07:51:16,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:51:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:16,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:51:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:51:16,111 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 07:51:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:16,131 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-23 07:51:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:51:16,133 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 07:51:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:16,143 INFO L225 Difference]: With dead ends: 39 [2020-12-23 07:51:16,143 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 07:51:16,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:51:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 07:51:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 07:51:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 07:51:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 07:51:16,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-12-23 07:51:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:16,184 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 07:51:16,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:51:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 07:51:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:51:16,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:16,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:16,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:51:16,186 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2020-12-23 07:51:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:16,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758411804] [2020-12-23 07:51:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:16,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:16,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968162102] [2020-12-23 07:51:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:51:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758411804] [2020-12-23 07:51:16,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:16,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968162102] [2020-12-23 07:51:16,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:16,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:51:16,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764112715] [2020-12-23 07:51:16,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:16,516 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-12-23 07:51:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:16,678 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 07:51:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:51:16,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 07:51:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:16,680 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:51:16,680 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:51:16,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 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 07:51:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:51:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 07:51:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:51:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 07:51:16,687 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-12-23 07:51:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:16,687 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 07:51:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:51:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 07:51:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:51:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:16,689 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:16,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:51:16,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash -937492348, now seen corresponding path program 1 times [2020-12-23 07:51:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:16,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062109290] [2020-12-23 07:51:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:16,928 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:16,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702697421] [2020-12-23 07:51:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:51:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:51:17,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062109290] [2020-12-23 07:51:17,191 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702697421] [2020-12-23 07:51:17,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:17,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:51:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243149025] [2020-12-23 07:51:17,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:51:17,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:51:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:51:17,194 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-12-23 07:51:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:20,687 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 07:51:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:51:20,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 07:51:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:20,689 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:51:20,689 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:51:20,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:51:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:51:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-12-23 07:51:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:51:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 07:51:20,697 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2020-12-23 07:51:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:20,697 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 07:51:20,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:51:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 07:51:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:51:20,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:20,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:20,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:20,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1342693294, now seen corresponding path program 1 times [2020-12-23 07:51:20,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:20,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256546073] [2020-12-23 07:51:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:20,943 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:20,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885086421] [2020-12-23 07:51:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:51:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:51:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:51:21,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256546073] [2020-12-23 07:51:21,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885086421] [2020-12-23 07:51:21,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:21,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:51:21,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112185495] [2020-12-23 07:51:21,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:51:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:51:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:51:21,102 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 5 states. [2020-12-23 07:51:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:25,170 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 07:51:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:51:25,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 07:51:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:25,172 INFO L225 Difference]: With dead ends: 22 [2020-12-23 07:51:25,172 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 07:51:25,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:51:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 07:51:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 07:51:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:51:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 07:51:25,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2020-12-23 07:51:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:25,178 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 07:51:25,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:51:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 07:51:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:51:25,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:25,180 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:25,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:25,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1342734009, now seen corresponding path program 2 times [2020-12-23 07:51:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:25,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753172351] [2020-12-23 07:51:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:25,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849084603] [2020-12-23 07:51:25,428 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:25,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:51:25,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:51:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:51:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:27,626 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~z~0))) (and (let ((.cse0 (= (+ (* c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~x~0) c_ULTIMATE.start_main_~a~0) (+ (* c_ULTIMATE.start_main_~az~0 c_ULTIMATE.start_main_~y~0) c_ULTIMATE.start_main_~x~0)))) (or (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)))) (= c_ULTIMATE.start_main_~z~0 c_ULTIMATE.start_main_~y~0) (= c_ULTIMATE.start_main_~x~0 (+ .cse1 c_ULTIMATE.start_main_~a~0)) (= c_ULTIMATE.start_main_~az~0 .cse1))) is different from false [2020-12-23 07:51:31,681 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 16 [2020-12-23 07:51:37,781 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 15 [2020-12-23 07:51:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-12-23 07:51:37,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753172351] [2020-12-23 07:51:37,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:37,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849084603] [2020-12-23 07:51:37,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:51:37,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:51:37,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890595352] [2020-12-23 07:51:37,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:51:37,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:51:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=40, Unknown=2, NotChecked=12, Total=72 [2020-12-23 07:51:37,816 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-12-23 07:51:47,138 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 18 [2020-12-23 07:51:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:47,175 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 07:51:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:51:47,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 07:51:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:47,177 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:51:47,177 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:51:47,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=26, Invalid=65, Unknown=3, NotChecked=16, Total=110 [2020-12-23 07:51:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:51:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-23 07:51:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:51:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 07:51:47,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2020-12-23 07:51:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:47,185 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 07:51:47,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:51:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 07:51:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:51:47,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:51:47,186 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:51:47,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:47,394 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:51:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:51:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1931585436, now seen corresponding path program 3 times [2020-12-23 07:51:47,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:51:47,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170329795] [2020-12-23 07:51:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:51:47,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:51:47,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13705427] [2020-12-23 07:51:47,418 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 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