/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/geo2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:46:21,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:46:21,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:46:21,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:46:21,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:46:21,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:46:21,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:46:21,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:46:21,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:46:21,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:46:21,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:46:21,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:46:21,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:46:21,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:46:21,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:46:21,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:46:21,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:46:21,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:46:21,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:46:21,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:46:21,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:46:21,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:46:21,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:46:21,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:46:21,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:46:21,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:46:21,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:46:21,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:46:21,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:46:21,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:46:21,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:46:21,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:46:21,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:46:21,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:46:21,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:46:21,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:46:21,293 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 07:46:21,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:46:21,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:46:21,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:46:21,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:46:21,323 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:46:21,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:46:21,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:46:21,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:46:21,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:46:21,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:46:21,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:46:21,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:46:21,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:46:21,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:46:21,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:46:21,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:46:21,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:46:21,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:46:21,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:46:21,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:46:21,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:46:21,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:46:21,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:46:21,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:46:21,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:46:21,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:46:21,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:46:21,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:46:21,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:46:21,788 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:46:21,789 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:46:21,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c [2020-12-23 07:46:21,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6e3c24254/027d5444daa841569af1293f52f7ceb1/FLAG410f745e2 [2020-12-23 07:46:22,475 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:46:22,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound20.c [2020-12-23 07:46:22,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6e3c24254/027d5444daa841569af1293f52f7ceb1/FLAG410f745e2 [2020-12-23 07:46:22,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6e3c24254/027d5444daa841569af1293f52f7ceb1 [2020-12-23 07:46:22,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:46:22,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:46:22,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:22,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:46:22,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:46:22,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6516345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22, skipping insertion in model container [2020-12-23 07:46:22,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:46:22,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:46:23,077 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/geo2-ll_unwindbound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~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[~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 07:46:23,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:23,103 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:46:23,117 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/geo2-ll_unwindbound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~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[~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 07:46:23,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:23,140 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:46:23,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23 WrapperNode [2020-12-23 07:46:23,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:23,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:23,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:46:23,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:46:23,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:23,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:46:23,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:46:23,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:46:23,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (1/1) ... [2020-12-23 07:46:23,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:46:23,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:46:23,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:46:23,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:46:23,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (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 07:46:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:46:23,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:46:23,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:46:23,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:46:23,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:46:23,541 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:46:23,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:23 BoogieIcfgContainer [2020-12-23 07:46:23,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:46:23,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:46:23,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:46:23,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:46:23,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:46:22" (1/3) ... [2020-12-23 07:46:23,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5200a77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:23, skipping insertion in model container [2020-12-23 07:46:23,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:23" (2/3) ... [2020-12-23 07:46:23,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5200a77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:23, skipping insertion in model container [2020-12-23 07:46:23,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:23" (3/3) ... [2020-12-23 07:46:23,568 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound20.c [2020-12-23 07:46:23,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:46:23,600 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:46:23,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:46:23,701 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:46:23,701 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:46:23,702 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:46:23,702 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:46:23,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:46:23,702 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:46:23,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:46:23,703 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:46:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 07:46:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:46:23,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:23,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:46:23,724 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 07:46:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908497407] [2020-12-23 07:46:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:23,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:23,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85968313] [2020-12-23 07:46:23,857 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 07:46:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:46:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:24,040 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 07:46:24,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908497407] [2020-12-23 07:46:24,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:24,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85968313] [2020-12-23 07:46:24,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:24,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:46:24,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982397733] [2020-12-23 07:46:24,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:46:24,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:24,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:46:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:46:24,067 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-23 07:46:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:24,159 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-23 07:46:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:46:24,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:46:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:24,170 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:46:24,170 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:46:24,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:46:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-23 07:46:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:46:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 07:46:24,213 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-23 07:46:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:24,213 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 07:46:24,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:46:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 07:46:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:46:24,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:24,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:24,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:46:24,430 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-23 07:46:24,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:24,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469813825] [2020-12-23 07:46:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:24,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:24,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136498376] [2020-12-23 07:46:24,463 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 07:46:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:46:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:24,626 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 07:46:24,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469813825] [2020-12-23 07:46:24,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:24,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136498376] [2020-12-23 07:46:24,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:24,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:46:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682810796] [2020-12-23 07:46:24,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:24,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:24,630 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 07:46:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:24,686 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 07:46:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:24,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 07:46:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:24,688 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:46:24,688 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:24,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:46:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 07:46:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:46:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 07:46:24,695 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-23 07:46:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:24,696 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 07:46:24,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 07:46:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:46:24,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:24,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 07:46:24,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:24,912 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-23 07:46:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:24,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734437880] [2020-12-23 07:46:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:24,931 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:24,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364948034] [2020-12-23 07:46:24,932 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 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 07:46:25,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:46:25,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:46:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:25,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734437880] [2020-12-23 07:46:25,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:25,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364948034] [2020-12-23 07:46:25,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:25,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:46:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900209777] [2020-12-23 07:46:25,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:46:25,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:25,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:46:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:25,173 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-23 07:46:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:33,537 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:46:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:33,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 07:46:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:33,538 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:46:33,539 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:46:33,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:46:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:46:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-23 07:46:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:46:33,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-23 07:46:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:33,546 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:46:33,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:46:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:46:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:46:33,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:33,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:33,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:33,750 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 1 times [2020-12-23 07:46:33,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:33,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430267899] [2020-12-23 07:46:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:33,767 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:33,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204426783] [2020-12-23 07:46:33,768 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 07:46:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:46:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430267899] [2020-12-23 07:46:33,899 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204426783] [2020-12-23 07:46:33,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:33,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:46:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739045999] [2020-12-23 07:46:33,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:33,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:33,901 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-23 07:46:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:33,944 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-23 07:46:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:33,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:46:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:33,946 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:33,946 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:33,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 07:46:33,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-12-23 07:46:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:33,953 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 07:46:33,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 07:46:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:46:33,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:33,954 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:34,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:34,168 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 1 times [2020-12-23 07:46:34,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:34,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581167163] [2020-12-23 07:46:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:34,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:34,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757181443] [2020-12-23 07:46:34,193 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 07:46:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:46:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:46:34,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581167163] [2020-12-23 07:46:34,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757181443] [2020-12-23 07:46:34,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:34,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:46:34,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913210758] [2020-12-23 07:46:34,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:46:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:34,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:46:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:34,351 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-12-23 07:46:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:38,429 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 07:46:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:38,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 07:46:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:38,431 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:38,431 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:38,432 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 07:46:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 07:46:38,438 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-12-23 07:46:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:38,439 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 07:46:38,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:46:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 07:46:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:46:38,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:38,440 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 07:46:38,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:38,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-23 07:46:38,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:38,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753875535] [2020-12-23 07:46:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:38,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:38,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438846340] [2020-12-23 07:46:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:46:38,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:46:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:41,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:46:43,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:46:59,645 WARN L197 SmtUtils]: Spent 10.11 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:47:05,716 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))))) is different from false [2020-12-23 07:47:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:47:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753875535] [2020-12-23 07:47:05,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:05,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438846340] [2020-12-23 07:47:05,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:05,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:47:05,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709065844] [2020-12-23 07:47:05,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:47:05,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:47:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=20, Unknown=3, NotChecked=8, Total=42 [2020-12-23 07:47:05,731 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-12-23 07:47:16,857 WARN L197 SmtUtils]: Spent 8.73 s on a formula simplification. DAG size of input: 37 DAG size of output: 12 [2020-12-23 07:47:38,592 WARN L197 SmtUtils]: Spent 10.73 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:49:27,403 WARN L197 SmtUtils]: Spent 1.57 m on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 07:49:57,851 WARN L197 SmtUtils]: Spent 26.24 s on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-23 07:50:49,298 WARN L197 SmtUtils]: Spent 24.02 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 07:50:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:50:53,324 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 07:50:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:50:53,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 07:50:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:50:53,340 INFO L225 Difference]: With dead ends: 23 [2020-12-23 07:50:53,340 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:50:53,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 217.2s TimeCoverageRelationStatistics Valid=41, Invalid=53, Unknown=20, NotChecked=18, Total=132 [2020-12-23 07:50:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:50:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 07:50:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:50:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 07:50:53,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 07:50:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:50:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 07:50:53,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:50:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 07:50:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:50:53,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:50:53,351 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:50:53,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:53,557 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:50:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:50:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 2 times [2020-12-23 07:50:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:50:53,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017245615] [2020-12-23 07:50:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:50:53,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:50:53,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339410776] [2020-12-23 07:50:53,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:53,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:50:53,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:50:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:50:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:50:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:50:53,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017245615] [2020-12-23 07:50:53,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:50:53,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339410776] [2020-12-23 07:50:53,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:50:53,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:50:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663559987] [2020-12-23 07:50:53,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:50:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:50:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:50:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:50:53,869 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-12-23 07:50:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:50:54,060 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:50:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:50:54,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 07:50:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:50:54,066 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:50:54,066 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:50:54,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:50:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:50:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:50:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:50:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:50:54,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-12-23 07:50:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:50:54,076 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:50:54,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:50:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:50:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:50:54,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:50:54,077 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:50:54,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:54,278 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:50:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:50:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 3 times [2020-12-23 07:50:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:50:54,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303054878] [2020-12-23 07:50:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:50:54,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:50:54,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764539673] [2020-12-23 07:50:54,296 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:54,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:50:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:50:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:50:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:50:57,154 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 07:50:57,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:50:59,225 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:51:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:51:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303054878] [2020-12-23 07:51:01,335 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764539673] [2020-12-23 07:51:01,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:01,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:51:01,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663849792] [2020-12-23 07:51:01,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2020-12-23 07:51:01,339 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states.