/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:47:16,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:47:16,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:47:16,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:47:16,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:47:16,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:47:16,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:47:16,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:47:16,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:47:16,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:47:16,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:47:16,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:47:16,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:47:16,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:47:16,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:47:16,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:47:16,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:47:16,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:47:16,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:47:16,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:47:16,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:47:16,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:47:16,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:47:16,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:47:16,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:47:16,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:47:16,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:47:16,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:47:16,425 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 07:47:16,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:47:16,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:47:16,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:47:16,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:47:16,467 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:47:16,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:47:16,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:47:16,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:47:16,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:47:16,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:47:16,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:47:16,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:47:16,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:47:16,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:47:16,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:47:16,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:47:16,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:47:16,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:47:16,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:47:16,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:47:16,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:47:16,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:47:16,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:47:16,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:47:16,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:47:16,881 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:47:16,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound50.c [2020-12-23 07:47:16,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06ad13e2e/991ac6289971440bb015497546943ae0/FLAG0ac3046cd [2020-12-23 07:47:17,669 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:47:17,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound50.c [2020-12-23 07:47:17,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06ad13e2e/991ac6289971440bb015497546943ae0/FLAG0ac3046cd [2020-12-23 07:47:18,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06ad13e2e/991ac6289971440bb015497546943ae0 [2020-12-23 07:47:18,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:47:18,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:47:18,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:47:18,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:47:18,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:47:18,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269a606b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18, skipping insertion in model container [2020-12-23 07:47:18,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:47:18,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:47:18,234 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_valuebound50.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 07:47:18,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:47:18,262 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:47:18,276 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_valuebound50.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 07:47:18,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:47:18,299 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:47:18,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18 WrapperNode [2020-12-23 07:47:18,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:47:18,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:47:18,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:47:18,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:47:18,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:47:18,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:47:18,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:47:18,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:47:18,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (1/1) ... [2020-12-23 07:47:18,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:47:18,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:47:18,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:47:18,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:47:18,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (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 07:47:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:47:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:47:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:47:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:47:18,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:47:18,769 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 07:47:18,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:47:18 BoogieIcfgContainer [2020-12-23 07:47:18,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:47:18,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:47:18,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:47:18,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:47:18,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:47:18" (1/3) ... [2020-12-23 07:47:18,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edc374c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:47:18, skipping insertion in model container [2020-12-23 07:47:18,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:47:18" (2/3) ... [2020-12-23 07:47:18,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edc374c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:47:18, skipping insertion in model container [2020-12-23 07:47:18,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:47:18" (3/3) ... [2020-12-23 07:47:18,782 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound50.c [2020-12-23 07:47:18,790 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:47:18,795 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:47:18,819 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:47:18,854 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:47:18,854 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:47:18,854 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:47:18,855 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:47:18,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:47:18,855 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:47:18,855 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:47:18,856 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:47:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 07:47:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:47:18,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:18,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:18,915 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-23 07:47:18,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:18,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982321240] [2020-12-23 07:47:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:19,207 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 07:47:19,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982321240] [2020-12-23 07:47:19,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:47:19,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:47:19,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627618404] [2020-12-23 07:47:19,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:47:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:47:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:47:19,246 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 07:47:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:19,270 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-12-23 07:47:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:47:19,272 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 07:47:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:19,293 INFO L225 Difference]: With dead ends: 35 [2020-12-23 07:47:19,293 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 07:47:19,305 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 07:47:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 07:47:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 07:47:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 07:47:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 07:47:19,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2020-12-23 07:47:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:19,348 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 07:47:19,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:47:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 07:47:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 07:47:19,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:19,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:19,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:47:19,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:19,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-23 07:47:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:19,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738332001] [2020-12-23 07:47:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:19,408 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:19,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138815306] [2020-12-23 07:47:19,409 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 07:47:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:47:19,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:19,751 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 07:47:19,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738332001] [2020-12-23 07:47:19,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:19,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138815306] [2020-12-23 07:47:19,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:47:19,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:47:19,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146270401] [2020-12-23 07:47:19,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:47:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:47:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:47:19,767 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-12-23 07:47:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:19,912 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-23 07:47:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:47:19,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 07:47:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:19,915 INFO L225 Difference]: With dead ends: 25 [2020-12-23 07:47:19,915 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:47:19,917 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 07:47:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:47:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-23 07:47:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 07:47:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-23 07:47:19,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2020-12-23 07:47:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:19,931 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-23 07:47:19,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:47:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-23 07:47:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:47:19,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:19,935 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:20,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:47:20,148 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:20,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2020-12-23 07:47:20,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:20,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189495178] [2020-12-23 07:47:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:20,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:20,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819335673] [2020-12-23 07:47:20,166 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 07:47:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:47:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:47:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:20,308 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 07:47:20,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189495178] [2020-12-23 07:47:20,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:20,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819335673] [2020-12-23 07:47:20,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:20,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:47:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037644873] [2020-12-23 07:47:20,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:47:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:47:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:47:20,312 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-12-23 07:47:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:20,439 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:47:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:47:20,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 07:47:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:20,441 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:47:20,441 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:47:20,442 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 07:47:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:47:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 07:47:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 07:47:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 07:47:20,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2020-12-23 07:47:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:20,448 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 07:47:20,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:47:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 07:47:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:47:20,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:20,450 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:20,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:47:20,664 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2020-12-23 07:47:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:20,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92239298] [2020-12-23 07:47:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:20,682 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:20,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491872634] [2020-12-23 07:47:20,683 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 07:47:20,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:47:20,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:47:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 07:47:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:26,354 WARN L197 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2020-12-23 07:47:26,419 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 07:47:26,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92239298] [2020-12-23 07:47:26,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:26,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491872634] [2020-12-23 07:47:26,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:26,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:47:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193075331] [2020-12-23 07:47:26,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:47:26,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:47:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:47:26,425 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-12-23 07:47:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:47:28,967 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 07:47:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:47:28,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-23 07:47:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:47:28,968 INFO L225 Difference]: With dead ends: 31 [2020-12-23 07:47:28,968 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 07:47:28,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:47:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 07:47:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 07:47:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:47:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:47:28,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2020-12-23 07:47:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:47:28,975 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:47:28,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:47:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:47:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:47:28,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:47:28,976 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:47:29,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:47:29,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:47:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:47:29,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2020-12-23 07:47:29,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:47:29,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243910389] [2020-12-23 07:47:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:47:29,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:47:29,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864305219] [2020-12-23 07:47:29,195 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 07:47:45,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:47:45,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:47:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 07:47:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:47:45,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:47:45,671 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-12-23 07:47:45,862 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 07:48:03,008 WARN L197 SmtUtils]: Spent 17.08 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-12-23 07:48:13,091 WARN L197 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-12-23 07:48:13,111 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:48:13,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:48:13,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:48:13,140 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 07:48:13,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:48:13,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:48:13,193 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 07:48:13,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 07:48:31,829 WARN L197 SmtUtils]: Spent 10.17 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-23 07:48:37,905 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) (<= ULTIMATE.start_main_~z~0 50) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (= (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 07:48:39,911 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) (<= ULTIMATE.start_main_~z~0 50) (= (mod (+ .cse1 (- 1)) ULTIMATE.start_main_~z~0) 0) (= (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 07:48:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 07:48:39,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243910389] [2020-12-23 07:48:39,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:48:39,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864305219] [2020-12-23 07:48:39,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:48:39,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:48:39,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172996204] [2020-12-23 07:48:39,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:48:39,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:48:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:48:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=4, NotChecked=18, Total=132 [2020-12-23 07:48:39,919 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2020-12-23 07:49:51,487 WARN L197 SmtUtils]: Spent 1.09 m on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 07:49:55,868 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2020-12-23 07:50:15,796 WARN L197 SmtUtils]: Spent 16.47 s on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-23 07:51:40,444 WARN L197 SmtUtils]: Spent 1.24 m on a formula simplification. DAG size of input: 59 DAG size of output: 57