/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:47:14,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:47:14,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:47:14,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:47:14,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:47:14,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:47:14,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:47:14,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:47:14,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:47:14,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:47:14,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:47:14,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:47:14,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:47:14,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:47:14,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:47:14,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:47:14,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:47:14,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:47:14,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:47:14,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:47:14,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:47:14,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:47:14,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:47:14,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:47:14,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:47:14,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:47:14,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:47:14,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:47:14,416 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 07:47:14,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:47:14,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:47:14,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:47:14,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:47:14,469 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:47:14,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:47:14,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:47:14,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:47:14,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:47:14,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:47:14,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:47:14,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:47:14,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:47:14,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:47:14,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:47:14,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:47:14,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:47:14,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:47:14,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:47:14,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:47:14,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:47:14,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:47:14,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:47:14,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:47:14,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:47:14,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:47:14,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:47:14,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:47:14,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:47:14,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:47:14,948 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:47:14,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound20.c [2020-12-23 07:47:15,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f550b0c1/cfc036f0002349a7ab31be75a73407b4/FLAGfd9f21262 [2020-12-23 07:47:15,750 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:47:15,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound20.c [2020-12-23 07:47:15,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f550b0c1/cfc036f0002349a7ab31be75a73407b4/FLAGfd9f21262 [2020-12-23 07:47:16,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f550b0c1/cfc036f0002349a7ab31be75a73407b4 [2020-12-23 07:47:16,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:47:16,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:47:16,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:47:16,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:47:16,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:47:16,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9b6025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16, skipping insertion in model container [2020-12-23 07:47:16,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:47:16,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:47:16,303 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:47:16,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:47:16,339 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:47:16,353 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound20.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:47:16,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:47:16,377 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:47:16,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16 WrapperNode [2020-12-23 07:47:16,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:47:16,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:47:16,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:47:16,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:47:16,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:47:16,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:47:16,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:47:16,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:47:16,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (1/1) ... [2020-12-23 07:47:16,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:47:16,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:47:16,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:47:16,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:47:16,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (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 07:47:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:47:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:47:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:47:16,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:47:16,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:47:16,794 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 07:47:16,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:47:16 BoogieIcfgContainer [2020-12-23 07:47:16,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:47:16,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:47:16,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:47:16,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:47:16,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:47:16" (1/3) ... [2020-12-23 07:47:16,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:47:16, skipping insertion in model container [2020-12-23 07:47:16,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:16" (2/3) ... [2020-12-23 07:47:16,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:47:16, skipping insertion in model container [2020-12-23 07:47:16,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:47:16" (3/3) ... [2020-12-23 07:47:16,807 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound20.c [2020-12-23 07:47:16,815 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:47:16,820 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:47:16,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:47:16,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:47:16,969 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:47:16,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:47:16,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:47:16,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:47:16,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:47:16,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:47:16,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:47:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 07:47:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:47:16,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:16,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:16,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-23 07:47:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:17,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628274717] [2020-12-23 07:47:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:17,259 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 07:47:17,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628274717] [2020-12-23 07:47:17,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:47:17,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:47:17,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320855940] [2020-12-23 07:47:17,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:47:17,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:47:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:47:17,290 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 07:47:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:17,312 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-23 07:47:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:47:17,313 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 07:47:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:17,323 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:47:17,323 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:47:17,327 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 07:47:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:47:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:47:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:47:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 07:47:17,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2020-12-23 07:47:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:17,375 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 07:47:17,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:47:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 07:47:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:47:17,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:17,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:17,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:47:17,376 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-23 07:47:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:17,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77651416] [2020-12-23 07:47:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:17,403 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:17,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094877721] [2020-12-23 07:47:17,404 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 07:47:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:47:17,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:17,753 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 07:47:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77651416] [2020-12-23 07:47:17,754 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094877721] [2020-12-23 07:47:17,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:47:17,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:47:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716502962] [2020-12-23 07:47:17,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:47:17,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:47:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:47:17,759 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-12-23 07:47:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:17,935 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 07:47:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:47:17,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 07:47:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:17,937 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:47:17,937 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:47:17,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:47:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:47:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 07:47:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:47:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 07:47:17,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2020-12-23 07:47:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:17,945 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 07:47:17,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:47:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 07:47:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:47:17,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:17,946 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:18,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:47:18,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2020-12-23 07:47:18,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:18,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289327926] [2020-12-23 07:47:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:18,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:18,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820308327] [2020-12-23 07:47:18,182 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 07:47:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:47:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:47:18,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289327926] [2020-12-23 07:47:18,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:18,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820308327] [2020-12-23 07:47:18,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:47:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302254297] [2020-12-23 07:47:18,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:47:18,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:47:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:47:18,361 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-12-23 07:47:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:18,536 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:47:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:47:18,537 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 07:47:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:18,538 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:47:18,538 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:47:18,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:47:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:47:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 07:47:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:47:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 07:47:18,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-12-23 07:47:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:18,546 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 07:47:18,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:47:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 07:47:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:47:18,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:18,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:18,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:47:18,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2020-12-23 07:47:18,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:18,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918728612] [2020-12-23 07:47:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:18,767 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:18,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577686169] [2020-12-23 07:47:18,768 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 07:47:18,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:47:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:47:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:47:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:23,329 WARN L197 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2020-12-23 07:47:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:47:23,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918728612] [2020-12-23 07:47:23,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:23,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577686169] [2020-12-23 07:47:23,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:23,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:47:23,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594004538] [2020-12-23 07:47:23,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:47:23,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:47:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:47:23,408 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-12-23 07:47:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:24,018 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 07:47:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:47:24,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:47:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:24,025 INFO L225 Difference]: With dead ends: 31 [2020-12-23 07:47:24,025 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:47:24,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:47:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:47:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 07:47:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:47:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:47:24,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2020-12-23 07:47:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:24,041 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:47:24,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:47:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:47:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:47:24,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:24,044 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:24,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:47:24,258 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2020-12-23 07:47:24,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:24,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243104900] [2020-12-23 07:47:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:24,293 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666168507] [2020-12-23 07:47:24,293 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 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 07:47:26,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:47:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:47:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:47:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:26,878 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:47:43,598 WARN L197 SmtUtils]: Spent 16.65 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-23 07:47:52,409 WARN L197 SmtUtils]: Spent 8.55 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-23 07:47:52,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:47:52,446 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:47:52,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:47:52,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:47:52,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:47:52,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:47:52,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:47:52,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 07:48:09,262 WARN L197 SmtUtils]: Spent 10.23 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-23 07:48:15,333 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse2 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (and (<= 0 ULTIMATE.start_main_~z~0) (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 20) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (= (+ (* ULTIMATE.start_main_~z~0 .cse2) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1))))))) is different from false [2020-12-23 07:48:17,339 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse2 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) (.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (and (<= 0 ULTIMATE.start_main_~z~0) (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (<= ULTIMATE.start_main_~z~0 20) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (= (+ (* ULTIMATE.start_main_~z~0 .cse2) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1))))))) is different from true [2020-12-23 07:48:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:48:17,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243104900] [2020-12-23 07:48:17,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:48:17,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666168507] [2020-12-23 07:48:17,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:48:17,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:48:17,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58369599] [2020-12-23 07:48:17,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:48:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:48:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:48:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=81, Unknown=3, NotChecked=18, Total=132 [2020-12-23 07:48:17,347 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2020-12-23 07:48:34,395 WARN L197 SmtUtils]: Spent 16.64 s on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2020-12-23 07:48:50,361 WARN L197 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 07:51:06,672 WARN L197 SmtUtils]: Spent 2.03 m on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-23 07:51:48,733 WARN L197 SmtUtils]: Spent 37.82 s on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 07:51:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:51:52,884 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 07:51:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:51:52,887 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-23 07:51:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:51:52,888 INFO L225 Difference]: With dead ends: 24 [2020-12-23 07:51:52,888 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 07:51:52,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 244.0s TimeCoverageRelationStatistics Valid=74, Invalid=189, Unknown=13, NotChecked=30, Total=306 [2020-12-23 07:51:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 07:51:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 07:51:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 07:51:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 07:51:52,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-23 07:51:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:51:52,890 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 07:51:52,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:51:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 07:51:52,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 07:51:53,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:51:53,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.