/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:19:46,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:19:46,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:19:46,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:19:46,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:19:46,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:19:46,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:19:46,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:19:46,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:19:46,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:19:46,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:19:46,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:19:46,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:19:46,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:19:46,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:19:46,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:19:46,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:19:46,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:19:46,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:19:46,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:19:46,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:19:46,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:19:46,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:19:46,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:19:46,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:19:46,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:19:46,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:19:46,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:19:46,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:19:46,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:19:46,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:19:46,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:19:46,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:19:46,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:19:46,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:19:46,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:19:46,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:19:46,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:19:46,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:19:46,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:19:46,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:19:46,523 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:19:46,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:19:46,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:19:46,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:19:46,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:19:46,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:19:46,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:19:46,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:19:46,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:19:46,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:19:46,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:19:46,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:19:46,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:19:46,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:19:46,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:19:46,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:19:46,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:19:46,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:19:46,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:19:46,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:19:46,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:19:46,528 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:19:46,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:19:46,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:19:46,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:19:46,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:19:46,973 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:19:46,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c [2020-12-22 05:19:47,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e404f4733/a682521080bc4a2cb070997bfd282dfb/FLAG9a6ff7eff [2020-12-22 05:19:47,683 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:19:47,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c [2020-12-22 05:19:47,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e404f4733/a682521080bc4a2cb070997bfd282dfb/FLAG9a6ff7eff [2020-12-22 05:19:48,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e404f4733/a682521080bc4a2cb070997bfd282dfb [2020-12-22 05:19:48,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:19:48,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:19:48,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:48,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:19:48,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:19:48,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36612579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48, skipping insertion in model container [2020-12-22 05:19:48,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:19:48,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:19:48,321 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c[546,559] [2020-12-22 05:19:48,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:48,347 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:19:48,362 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound100.c[546,559] [2020-12-22 05:19:48,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:48,388 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:19:48,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48 WrapperNode [2020-12-22 05:19:48,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:48,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:48,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:19:48,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:19:48,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:48,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:19:48,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:19:48,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:19:48,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... [2020-12-22 05:19:48,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:19:48,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:19:48,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:19:48,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:19:48,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:19:48,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:19:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:19:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:19:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:19:48,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:19:48,864 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:19:48,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:48 BoogieIcfgContainer [2020-12-22 05:19:48,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:19:48,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:19:48,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:19:48,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:19:48,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:19:48" (1/3) ... [2020-12-22 05:19:48,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d28118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:48, skipping insertion in model container [2020-12-22 05:19:48,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:48" (2/3) ... [2020-12-22 05:19:48,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d28118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:48, skipping insertion in model container [2020-12-22 05:19:48,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:48" (3/3) ... [2020-12-22 05:19:48,877 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound100.c [2020-12-22 05:19:48,906 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:19:48,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:19:48,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:19:49,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:19:49,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:19:49,055 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:19:49,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:19:49,056 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:19:49,056 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:19:49,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:19:49,056 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:19:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 05:19:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:19:49,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:49,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:49,111 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2020-12-22 05:19:49,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:49,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190768060] [2020-12-22 05:19:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:19:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190768060] [2020-12-22 05:19:49,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:49,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:19:49,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127026157] [2020-12-22 05:19:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:19:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:19:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:19:49,378 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-22 05:19:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:49,397 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-12-22 05:19:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:19:49,399 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 05:19:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:49,408 INFO L225 Difference]: With dead ends: 37 [2020-12-22 05:19:49,409 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:19:49,412 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 [2020-12-22 05:19:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:19:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:19:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:19:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 05:19:49,446 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2020-12-22 05:19:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:49,446 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 05:19:49,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:19:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 05:19:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:19:49,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:49,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:49,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:19:49,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-22 05:19:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:49,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958008237] [2020-12-22 05:19:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:49,473 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:49,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452557409] [2020-12-22 05:19:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:19:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:19:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:19:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958008237] [2020-12-22 05:19:49,661 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452557409] [2020-12-22 05:19:49,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:49,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:19:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111635360] [2020-12-22 05:19:49,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:19:49,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:49,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:19:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:19:49,666 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-22 05:19:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:49,808 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-22 05:19:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:19:49,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:19:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:49,810 INFO L225 Difference]: With dead ends: 30 [2020-12-22 05:19:49,810 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:19:49,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:19:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:19:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 05:19:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:19:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 05:19:49,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-22 05:19:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:49,828 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 05:19:49,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:19:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 05:19:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:19:49,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:49,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:50,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:19:50,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1782419994, now seen corresponding path program 1 times [2020-12-22 05:19:50,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:50,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819159977] [2020-12-22 05:19:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:50,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:50,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831424291] [2020-12-22 05:19:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:19:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:19:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:19:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819159977] [2020-12-22 05:19:50,270 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831424291] [2020-12-22 05:19:50,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:19:50,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:19:50,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282525707] [2020-12-22 05:19:50,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:19:50,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:19:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:19:50,276 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-12-22 05:19:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:50,586 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-22 05:19:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:19:50,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 05:19:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:50,591 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:19:50,591 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:19:50,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:19:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:19:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 05:19:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:19:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 05:19:50,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-12-22 05:19:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:50,607 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 05:19:50,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:19:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 05:19:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:19:50,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:50,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:50,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:19:50,825 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash 397544518, now seen corresponding path program 2 times [2020-12-22 05:19:50,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:50,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029834717] [2020-12-22 05:19:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:50,845 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:50,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522805085] [2020-12-22 05:19:50,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:19:50,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:19:50,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:19:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 05:19:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:57,158 WARN L197 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-22 05:19:59,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:19:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:19:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029834717] [2020-12-22 05:19:59,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:59,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522805085] [2020-12-22 05:19:59,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:19:59,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:19:59,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098461290] [2020-12-22 05:19:59,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:19:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:19:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2020-12-22 05:19:59,422 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 05:20:05,463 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-12-22 05:20:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:20:10,040 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-22 05:20:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 05:20:10,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 05:20:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:20:10,046 INFO L225 Difference]: With dead ends: 30 [2020-12-22 05:20:10,046 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:20:10,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2020-12-22 05:20:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:20:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-22 05:20:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:20:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 05:20:10,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-12-22 05:20:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:20:10,065 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 05:20:10,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:20:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 05:20:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:20:10,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:20:10,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:20:10,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:20:10,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:20:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:20:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash -561065459, now seen corresponding path program 1 times [2020-12-22 05:20:10,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:20:10,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766583537] [2020-12-22 05:20:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:20:10,287 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:20:10,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410230992] [2020-12-22 05:20:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:20:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:20:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:20:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:20:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:20:10,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766583537] [2020-12-22 05:20:10,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:20:10,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410230992] [2020-12-22 05:20:10,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:20:10,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:20:10,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980334037] [2020-12-22 05:20:10,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:20:10,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:20:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:20:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:20:10,414 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-12-22 05:20:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:20:10,467 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 05:20:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:20:10,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-22 05:20:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:20:10,470 INFO L225 Difference]: With dead ends: 28 [2020-12-22 05:20:10,470 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:20:10,471 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 [2020-12-22 05:20:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:20:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:20:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:20:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 05:20:10,478 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-12-22 05:20:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:20:10,479 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 05:20:10,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:20:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 05:20:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:20:10,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:20:10,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:20:10,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:20:10,695 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:20:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:20:10,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2028801382, now seen corresponding path program 1 times [2020-12-22 05:20:10,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:20:10,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525329662] [2020-12-22 05:20:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:20:10,716 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:20:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517407911] [2020-12-22 05:20:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:20:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:20:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:20:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:20:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:20:10,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525329662] [2020-12-22 05:20:10,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:20:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517407911] [2020-12-22 05:20:10,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:20:10,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:20:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850003319] [2020-12-22 05:20:10,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:20:10,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:20:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:20:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:20:10,924 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-12-22 05:20:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:20:19,366 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 05:20:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:20:19,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-22 05:20:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:20:19,368 INFO L225 Difference]: With dead ends: 28 [2020-12-22 05:20:19,368 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:20:19,369 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 [2020-12-22 05:20:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:20:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:20:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:20:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 05:20:19,376 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-12-22 05:20:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:20:19,376 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 05:20:19,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:20:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 05:20:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 05:20:19,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:20:19,377 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:20:19,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:20:19,591 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:20:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:20:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash -202648735, now seen corresponding path program 2 times [2020-12-22 05:20:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:20:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952464360] [2020-12-22 05:20:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:20:19,618 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:20:19,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611861334] [2020-12-22 05:20:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:20:19,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:20:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:20:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:20:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:20:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:20:19,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952464360] [2020-12-22 05:20:19,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:20:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611861334] [2020-12-22 05:20:19,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:20:19,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:20:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104407839] [2020-12-22 05:20:19,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:20:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:20:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:20:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:20:19,741 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2020-12-22 05:20:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:20:19,813 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 05:20:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:20:19,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-22 05:20:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:20:19,814 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:20:19,815 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 05:20:19,815 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 [2020-12-22 05:20:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 05:20:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 05:20:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 05:20:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 05:20:19,824 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-12-22 05:20:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:20:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 05:20:19,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:20:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 05:20:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 05:20:19,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:20:19,825 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:20:20,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:20:20,041 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:20:20,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:20:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash 629148341, now seen corresponding path program 3 times [2020-12-22 05:20:20,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:20:20,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345684889] [2020-12-22 05:20:20,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:20:20,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:20:20,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043942177] [2020-12-22 05:20:20,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 05:20:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 05:20:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:20:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:20:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:20:20,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:20:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 05:20:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345684889] [2020-12-22 05:20:20,566 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:20:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043942177] [2020-12-22 05:20:20,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:20:20,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:20:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765202305] [2020-12-22 05:20:20,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:20:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:20:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:20:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:20:20,568 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2020-12-22 05:20:32,159 WARN L197 SmtUtils]: Spent 11.57 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-22 05:20:40,847 WARN L197 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-22 05:20:55,119 WARN L197 SmtUtils]: Spent 7.65 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-22 05:20:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:20:55,274 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 05:20:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:20:55,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-22 05:20:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:20:55,276 INFO L225 Difference]: With dead ends: 28 [2020-12-22 05:20:55,276 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 05:20:55,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2020-12-22 05:20:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 05:20:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 05:20:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 05:20:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 05:20:55,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-12-22 05:20:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:20:55,278 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 05:20:55,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:20:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 05:20:55,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 05:20:55,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:20:55,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 05:20:55,866 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-12-22 05:21:06,160 WARN L197 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-12-22 05:21:06,164 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))) [2020-12-22 05:21:06,164 INFO L189 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 05:21:06,165 INFO L189 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2020-12-22 05:21:06,166 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)))) [2020-12-22 05:21:06,166 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2020-12-22 05:21:06,166 INFO L189 CegarLoopUtils]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-12-22 05:21:06,166 INFO L189 CegarLoopUtils]: For program point L12-1(lines 12 14) no Hoare annotation was computed. [2020-12-22 05:21:06,166 INFO L192 CegarLoopUtils]: At program point L16-5(lines 15 21) the Hoare annotation is: true [2020-12-22 05:21:06,166 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 05:21:06,167 INFO L192 CegarLoopUtils]: At program point L50(lines 23 51) the Hoare annotation is: true [2020-12-22 05:21:06,167 INFO L189 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2020-12-22 05:21:06,167 INFO L189 CegarLoopUtils]: For program point L17-1(lines 17 18) no Hoare annotation was computed. [2020-12-22 05:21:06,167 INFO L189 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2020-12-22 05:21:06,167 INFO L189 CegarLoopUtils]: For program point L13-2(line 13) no Hoare annotation was computed. [2020-12-22 05:21:06,167 INFO L189 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2020-12-22 05:21:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:21:06 BoogieIcfgContainer [2020-12-22 05:21:06,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:21:06,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:21:06,189 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:21:06,189 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:21:06,190 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:48" (3/4) ... [2020-12-22 05:21:06,193 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 05:21:06,207 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-22 05:21:06,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 05:21:06,209 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 05:21:06,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 05:21:06,269 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/geo1-ll_unwindbound100.c-witness.graphml [2020-12-22 05:21:06,269 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:21:06,271 INFO L168 Benchmark]: Toolchain (without parser) took 78188.20 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 126.2 MB in the beginning and 142.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,271 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:21:06,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,273 INFO L168 Benchmark]: Boogie Preprocessor took 29.91 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,273 INFO L168 Benchmark]: RCFGBuilder took 403.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 100.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,274 INFO L168 Benchmark]: TraceAbstraction took 77320.48 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.4 MB in the beginning and 145.0 MB in the end (delta: -44.6 MB). Peak memory consumption was 70.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,275 INFO L168 Benchmark]: Witness Printer took 80.13 ms. Allocated memory is still 181.4 MB. Free memory was 145.0 MB in the beginning and 142.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:21:06,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 79.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.91 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 100.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 77320.48 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.4 MB in the beginning and 145.0 MB in the end (delta: -44.6 MB). Peak memory consumption was 70.8 MB. Max. memory is 8.0 GB. * Witness Printer took 80.13 ms. Allocated memory is still 181.4 MB. Free memory was 145.0 MB in the beginning and 142.4 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: 66.4s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 54.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 216 SDslu, 195 SDs, 0 SdLazy, 223 SolverSat, 60 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 40.5s 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, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 244 FormulaSimplificationTreeSizeReductionInter, 10.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.5s 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...