/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/geo1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:44:38,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:44:38,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:44:38,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:44:38,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:44:38,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:44:38,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:44:38,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:44:38,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:44:38,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:44:38,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:44:38,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:44:38,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:44:38,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:44:38,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:44:38,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:44:38,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:44:38,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:44:38,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:44:38,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:44:38,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:44:38,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:44:38,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:44:38,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:44:38,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:44:38,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:44:38,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:44:38,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:44:38,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:44:38,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:44:38,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:44:38,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:44:38,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:44:38,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:44:38,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:44:38,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:44:38,392 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 07:44:38,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:44:38,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:44:38,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:44:38,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:44:38,450 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:44:38,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:44:38,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:44:38,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:44:38,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:44:38,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:44:38,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:44:38,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:44:38,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:44:38,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:44:38,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:44:38,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:44:38,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:44:38,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:44:38,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:44:38,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:44:38,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:44:38,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:44:38,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:44:38,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:44:38,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:44:38,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:44:38,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:44:38,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:44:38,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:44:38,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:44:38,911 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:44:38,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2020-12-23 07:44:39,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b5de1095/a4733f07e24041adbf38db2367cbcc38/FLAG7205caf69 [2020-12-23 07:44:39,695 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:44:39,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound20.c [2020-12-23 07:44:39,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b5de1095/a4733f07e24041adbf38db2367cbcc38/FLAG7205caf69 [2020-12-23 07:44:40,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3b5de1095/a4733f07e24041adbf38db2367cbcc38 [2020-12-23 07:44:40,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:44:40,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:44:40,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:44:40,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:44:40,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:44:40,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d1db665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40, skipping insertion in model container [2020-12-23 07:44:40,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:44:40,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:44:40,233 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/geo1-ll_unwindbound20.c[546,559] 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,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:44:40,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:44:40,262 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:44:40,276 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/geo1-ll_unwindbound20.c[546,559] 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,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 07:44:40,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:44:40,299 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:44:40,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40 WrapperNode [2020-12-23 07:44:40,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:44:40,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:44:40,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:44:40,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:44:40,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:44:40,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:44:40,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:44:40,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:44:40,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (1/1) ... [2020-12-23 07:44:40,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:44:40,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:44:40,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:44:40,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:44:40,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (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 07:44:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:44:40,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:44:40,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:44:40,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:44:40,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:44:40,801 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 07:44:40,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:44:40 BoogieIcfgContainer [2020-12-23 07:44:40,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:44:40,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:44:40,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:44:40,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:44:40,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:44:40" (1/3) ... [2020-12-23 07:44:40,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be86397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:44:40, skipping insertion in model container [2020-12-23 07:44:40,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:44:40" (2/3) ... [2020-12-23 07:44:40,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be86397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:44:40, skipping insertion in model container [2020-12-23 07:44:40,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:44:40" (3/3) ... [2020-12-23 07:44:40,813 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2020-12-23 07:44:40,820 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:44:40,825 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:44:40,869 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:44:40,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:44:40,915 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:44:40,915 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:44:40,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:44:40,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:44:40,915 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:44:40,916 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:44:40,916 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:44:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 07:44:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:44:40,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:40,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:44:40,939 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:44:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2020-12-23 07:44:40,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:40,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375063307] [2020-12-23 07:44:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:44:41,185 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 07:44:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375063307] [2020-12-23 07:44:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:44:41,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:44:41,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034120979] [2020-12-23 07:44:41,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:44:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:44:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:44:41,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:44:41,228 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 07:44:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:44:41,256 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-23 07:44:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:44:41,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 07:44:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:44:41,284 INFO L225 Difference]: With dead ends: 37 [2020-12-23 07:44:41,285 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 07:44:41,295 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 07:44:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 07:44:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 07:44:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:44:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 07:44:41,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2020-12-23 07:44:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:44:41,352 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 07:44:41,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:44:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 07:44:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:44:41,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:41,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:44:41,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:44:41,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:44:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-23 07:44:41,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:41,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363428802] [2020-12-23 07:44:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:41,410 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:44:41,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859543008] [2020-12-23 07:44:41,411 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 07:44:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:44:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:44:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:44:41,744 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 07:44:41,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363428802] [2020-12-23 07:44:41,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:44:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859543008] [2020-12-23 07:44:41,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:44:41,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:44:41,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232065893] [2020-12-23 07:44:41,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:44:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:44:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:44:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:44:41,749 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 07:44:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:44:41,971 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-23 07:44:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:44:41,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 07:44:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:44:41,974 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:44:41,974 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:44:41,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:44:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:44:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 07:44:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:44:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 07:44:41,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-23 07:44:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:44:41,982 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 07:44:41,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:44:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 07:44:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:44:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:41,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:44:42,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:44:42,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:44:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1782419994, now seen corresponding path program 1 times [2020-12-23 07:44:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:42,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370961494] [2020-12-23 07:44:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:42,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:44:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439528656] [2020-12-23 07:44:42,229 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 07:44:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:44:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:44:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:44:42,438 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 07:44:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370961494] [2020-12-23 07:44:42,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:44:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439528656] [2020-12-23 07:44:42,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:44:42,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:44:42,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485898178] [2020-12-23 07:44:42,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:44:42,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:44:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:44:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:44:42,442 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-12-23 07:44:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:44:42,652 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:44:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:44:42,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 07:44:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:44:42,654 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:44:42,654 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:44:42,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:44:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:44:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-23 07:44:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:44:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 07:44:42,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-12-23 07:44:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:44:42,662 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 07:44:42,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:44:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 07:44:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:44:42,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:44:42,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:44:42,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:44:42,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:44:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:44:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 397544518, now seen corresponding path program 2 times [2020-12-23 07:44:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:44:42,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955648923] [2020-12-23 07:44:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:44:42,894 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:44:42,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208935912] [2020-12-23 07:44:42,894 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 07:44:42,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:44:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:44:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 07:44:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:44:47,130 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 07:44:49,368 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:44:49,405 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 07:44:49,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955648923] [2020-12-23 07:44:49,406 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:44:49,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208935912] [2020-12-23 07:44:49,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:44:49,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:44:49,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727236203] [2020-12-23 07:44:49,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:44:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:44:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:44:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2020-12-23 07:44:49,409 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-23 07:44:52,036 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-12-23 07:45:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:45:05,489 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-23 07:45:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:45:05,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 07:45:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:45:05,491 INFO L225 Difference]: With dead ends: 30 [2020-12-23 07:45:05,491 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 07:45:05,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=87, Invalid=216, Unknown=3, NotChecked=0, Total=306 [2020-12-23 07:45:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 07:45:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-23 07:45:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:45:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 07:45:05,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-12-23 07:45:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:45:05,500 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 07:45:05,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:45:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 07:45:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:45:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:45:05,501 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:45:05,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:45:05,702 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:45:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:45:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash -561065459, now seen corresponding path program 1 times [2020-12-23 07:45:05,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:45:05,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940746020] [2020-12-23 07:45:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:45:05,719 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:45:05,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963878740] [2020-12-23 07:45:05,720 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 07:45:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:45:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:45:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:45:05,858 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 07:45:05,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940746020] [2020-12-23 07:45:05,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:45:05,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963878740] [2020-12-23 07:45:05,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:45:05,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:45:05,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288656675] [2020-12-23 07:45:05,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:45:05,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:45:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:45:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:45:05,862 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-23 07:45:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:45:05,904 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 07:45:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:45:05,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-23 07:45:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:45:05,905 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:45:05,906 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:45:05,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 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 07:45:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:45:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:45:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:45:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 07:45:05,913 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-23 07:45:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:45:05,913 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 07:45:05,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:45:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 07:45:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:45:05,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:45:05,915 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:45:06,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:45:06,129 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:45:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:45:06,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2028801382, now seen corresponding path program 1 times [2020-12-23 07:45:06,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:45:06,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179455459] [2020-12-23 07:45:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:45:06,148 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:45:06,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297569258] [2020-12-23 07:45:06,148 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 07:45:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:45:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:45:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:45:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:45:06,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179455459] [2020-12-23 07:45:06,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:45:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297569258] [2020-12-23 07:45:06,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:45:06,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:45:06,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977810414] [2020-12-23 07:45:06,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:45:06,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:45:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:45:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:45:06,344 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-12-23 07:45:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:45:14,740 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:45:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:45:14,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-23 07:45:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:45:14,741 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:45:14,741 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:45:14,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:45:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:45:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:45:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:45:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:45:14,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-23 07:45:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:45:14,750 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:45:14,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:45:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:45:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:45:14,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:45:14,754 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:45:14,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:45:14,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:45:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:45:14,957 INFO L82 PathProgramCache]: Analyzing trace with hash -202648735, now seen corresponding path program 2 times [2020-12-23 07:45:14,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:45:14,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867179486] [2020-12-23 07:45:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:45:14,971 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:45:14,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664379432] [2020-12-23 07:45:14,971 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 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 07:45:15,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:45:15,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:45:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:45:15,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:45:15,105 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 07:45:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867179486] [2020-12-23 07:45:15,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:45:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664379432] [2020-12-23 07:45:15,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:45:15,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:45:15,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553699382] [2020-12-23 07:45:15,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:45:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:45:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:45:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:45:15,109 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2020-12-23 07:45:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:45:15,168 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 07:45:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:45:15,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-23 07:45:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:45:15,169 INFO L225 Difference]: With dead ends: 32 [2020-12-23 07:45:15,169 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:45:15,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:45:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:45:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 07:45:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:45:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-23 07:45:15,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-12-23 07:45:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:45:15,194 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-23 07:45:15,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:45:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-23 07:45:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:45:15,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:45:15,196 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:45:15,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:45:15,404 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:45:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:45:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 629148341, now seen corresponding path program 3 times [2020-12-23 07:45:15,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:45:15,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818704765] [2020-12-23 07:45:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:45:15,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:45:15,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897018668] [2020-12-23 07:45:15,421 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 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 07:45:15,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:45:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:45:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:45:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:45:19,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:45:19,722 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 07:45:19,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818704765] [2020-12-23 07:45:19,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:45:19,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897018668] [2020-12-23 07:45:19,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:45:19,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:45:19,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170740889] [2020-12-23 07:45:19,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:45:19,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:45:19,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:45:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2020-12-23 07:45:19,725 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-12-23 07:45:32,945 WARN L197 SmtUtils]: Spent 11.11 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-23 07:45:45,821 WARN L197 SmtUtils]: Spent 12.86 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-23 07:46:06,262 WARN L197 SmtUtils]: Spent 13.56 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:46:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:08,334 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:46:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:46:08,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-23 07:46:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:08,336 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:46:08,336 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 07:46:08,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=27, Invalid=41, Unknown=4, NotChecked=0, Total=72 [2020-12-23 07:46:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 07:46:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 07:46:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 07:46:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 07:46:08,337 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-23 07:46:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:08,338 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 07:46:08,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 07:46:08,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 07:46:08,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:08,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 07:46:11,727 WARN L197 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-12-23 07:46:34,090 WARN L197 SmtUtils]: Spent 22.36 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-23 07:46:34,094 INFO L185 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (let ((.cse2 (<= 1 ULTIMATE.start_main_~k~0)) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (<= 1 ULTIMATE.start_main_~z~0))) (or (let ((.cse1 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (<= 2 ULTIMATE.start_main_~c~0) (let ((.cse0 (div .cse1 ULTIMATE.start_main_~z~0))) (= (+ (* .cse0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~z~0 (* .cse0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0)))) (= (mod .cse1 ULTIMATE.start_main_~z~0) 0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2 .cse3 .cse4)) (and (= ULTIMATE.start_main_~x~0 1) (<= ~counter~0 0) .cse2 (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) (<= 1 ULTIMATE.start_main_~c~0) .cse3 .cse4))) [2020-12-23 07:46:34,094 INFO L189 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2020-12-23 07:46:34,094 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2020-12-23 07:46:34,095 INFO L185 CegarLoopUtils]: At program point L16-2(lines 38 39) the Hoare annotation is: (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (<= 1 ULTIMATE.start_main_~k~0)) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse3 (<= 1 ULTIMATE.start_main_~z~0))) (or (and (<= ~counter~0 1) (= ULTIMATE.start_main_~x~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) (<= 1 ULTIMATE.start_main_~c~0) .cse2 .cse3) (let ((.cse5 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (<= 2 ULTIMATE.start_main_~c~0) (let ((.cse4 (div .cse5 ULTIMATE.start_main_~z~0))) (= (+ (* .cse4 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~z~0 (* .cse4 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0)))) (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0)) (= (mod .cse5 ULTIMATE.start_main_~z~0) 0) .cse0 .cse1 .cse2 .cse3)))) [2020-12-23 07:46:34,095 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point L12-1(lines 12 14) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L192 CegarLoopUtils]: At program point L16-5(lines 15 21) the Hoare annotation is: true [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L192 CegarLoopUtils]: At program point L50(lines 23 51) the Hoare annotation is: true [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point L17-1(lines 17 18) no Hoare annotation was computed. [2020-12-23 07:46:34,096 INFO L189 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2020-12-23 07:46:34,097 INFO L189 CegarLoopUtils]: For program point L13-2(line 13) no Hoare annotation was computed. [2020-12-23 07:46:34,097 INFO L189 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2020-12-23 07:46:34,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:46:34 BoogieIcfgContainer [2020-12-23 07:46:34,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:46:34,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:46:34,121 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:46:34,121 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:46:34,121 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:44:40" (3/4) ... [2020-12-23 07:46:34,125 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 07:46:34,136 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-23 07:46:34,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 07:46:34,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:46:34,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 07:46:34,186 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/geo1-ll_unwindbound20.c-witness.graphml [2020-12-23 07:46:34,187 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:46:34,188 INFO L168 Benchmark]: Toolchain (without parser) took 114141.93 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.2 MB in the beginning and 75.7 MB in the end (delta: 57.5 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,188 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:46:34,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 123.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,190 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.80 ms. Allocated memory is still 151.0 MB. Free memory was 123.1 MB in the beginning and 121.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,190 INFO L168 Benchmark]: Boogie Preprocessor took 75.10 ms. Allocated memory is still 151.0 MB. Free memory was 121.7 MB in the beginning and 134.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,191 INFO L168 Benchmark]: RCFGBuilder took 383.71 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 121.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,192 INFO L168 Benchmark]: TraceAbstraction took 113314.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.9 MB in the beginning and 78.3 MB in the end (delta: 42.6 MB). Peak memory consumption was 73.9 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,192 INFO L168 Benchmark]: Witness Printer took 66.13 ms. Allocated memory is still 181.4 MB. Free memory was 78.3 MB in the beginning and 75.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:46:34,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 123.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.80 ms. Allocated memory is still 151.0 MB. Free memory was 123.1 MB in the beginning and 121.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.10 ms. Allocated memory is still 151.0 MB. Free memory was 121.7 MB in the beginning and 134.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 383.71 ms. Allocated memory is still 151.0 MB. Free memory was 134.5 MB in the beginning and 121.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 113314.90 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 120.9 MB in the beginning and 78.3 MB in the end (delta: 42.6 MB). Peak memory consumption was 73.9 MB. Max. memory is 8.0 GB. * Witness Printer took 66.13 ms. Allocated memory is still 181.4 MB. Free memory was 78.3 MB in the beginning and 75.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((2 <= c && (x + -1) / z * z + y == z + (x + -1) / z * z * z) && (x + -1) % z == 0) && 1 == cond) && 1 <= k) && cond == 1) && 1 <= z) || ((((((x == 1 && counter <= 0) && 1 <= k) && z == y) && 1 <= c) && cond == 1) && 1 <= z) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((((((counter <= 1 && x == 1) && 1 == cond) && 1 <= k) && z == y) && 1 <= c) && cond == 1) && 1 <= z) || (((((((2 <= c && (x + -1) / z * z + y == z + (x + -1) / z * z * z) && z * x + 1 == x + y) && (x + -1) % z == 0) && 1 == cond) && 1 <= k) && cond == 1) && 1 <= z) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 87.6s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 73.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 216 SDslu, 193 SDs, 0 SdLazy, 225 SolverSat, 60 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 23.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 60.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 15 NumberOfFragments, 146 HoareAnnotationTreeSize, 4 FomulaSimplifications, 872 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 244 FormulaSimplificationTreeSizeReductionInter, 25.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 142 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 15981 SizeOfPredicates, 48 NumberOfNonLiveVariables, 684 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 36/83 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...