/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/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:37:07,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:37:07,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:37:07,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:37:07,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:37:07,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:37:07,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:37:07,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:37:07,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:37:07,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:37:07,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:37:07,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:37:07,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:37:07,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:37:07,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:37:07,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:37:07,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:37:07,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:37:07,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:37:07,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:37:07,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:37:07,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:37:07,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:37:07,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:37:07,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 05:37:07,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 05:37:07,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 05:37:07,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 05:37:07,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 05:37:07,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 05:37:07,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:37:07,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:37:07,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:37:07,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:37:07,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:37:07,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:37:07,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:37:07,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:37:07,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:37:07,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:37:07,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:37:07,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:37:07,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:37:07,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:37:07,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:37:07,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:37:07,327 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:37:07,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:37:07,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:37:07,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:37:07,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:37:07,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:37:07,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:37:07,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:37:07,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:37:07,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:37:07,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:37:07,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:37:07,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:37:07,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:37:07,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:37:07,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:37:07,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:37:07,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:37:07,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:37:07,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:37:07,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:37:07,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:37:07,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:37:07,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:37:07,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:37:07,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:37:07,722 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:37:07,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2020-12-22 05:37:07,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03c7bdf4/f3b488f40c904f4eb2c78772311c4c89/FLAG22b429fee [2020-12-22 05:37:08,489 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:37:08,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2020-12-22 05:37:08,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03c7bdf4/f3b488f40c904f4eb2c78772311c4c89/FLAG22b429fee [2020-12-22 05:37:08,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e03c7bdf4/f3b488f40c904f4eb2c78772311c4c89 [2020-12-22 05:37:08,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:37:08,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:37:08,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:08,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:37:08,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:37:08,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:08" (1/1) ... [2020-12-22 05:37:08,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f849631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:08, skipping insertion in model container [2020-12-22 05:37:08,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:37:08" (1/1) ... [2020-12-22 05:37:08,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:37:08,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:37:09,099 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2020-12-22 05:37:09,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:09,155 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:37:09,173 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2020-12-22 05:37:09,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:37:09,226 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:37:09,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09 WrapperNode [2020-12-22 05:37:09,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:37:09,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:09,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:37:09,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:37:09,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:37:09,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:37:09,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:37:09,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:37:09,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... [2020-12-22 05:37:09,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:37:09,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:37:09,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:37:09,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:37:09,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:37:09,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:37:09,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:37:09,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:37:09,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:37:09,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:37:09,867 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:37:09,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:09 BoogieIcfgContainer [2020-12-22 05:37:09,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:37:09,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:37:09,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:37:09,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:37:09,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:37:08" (1/3) ... [2020-12-22 05:37:09,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3685aa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:09, skipping insertion in model container [2020-12-22 05:37:09,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:37:09" (2/3) ... [2020-12-22 05:37:09,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3685aa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:37:09, skipping insertion in model container [2020-12-22 05:37:09,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:09" (3/3) ... [2020-12-22 05:37:09,886 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2020-12-22 05:37:09,898 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:37:09,909 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:37:09,997 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:37:10,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:37:10,049 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:37:10,050 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:37:10,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:37:10,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:37:10,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:37:10,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:37:10,052 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:37:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 05:37:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:37:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:10,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:10,085 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2020-12-22 05:37:10,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:10,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940861869] [2020-12-22 05:37:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940861869] [2020-12-22 05:37:10,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:10,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:37:10,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692027612] [2020-12-22 05:37:10,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:37:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:37:10,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:37:10,287 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 05:37:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:10,306 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2020-12-22 05:37:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:37:10,308 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 05:37:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:10,318 INFO L225 Difference]: With dead ends: 47 [2020-12-22 05:37:10,318 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 05:37:10,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:37:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 05:37:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 05:37:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 05:37:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-22 05:37:10,360 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-12-22 05:37:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:10,360 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-22 05:37:10,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:37:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-22 05:37:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 05:37:10,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:10,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:10,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:37:10,362 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-12-22 05:37:10,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:10,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565604822] [2020-12-22 05:37:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:10,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:10,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464872511] [2020-12-22 05:37:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:37:10,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:10,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565604822] [2020-12-22 05:37:10,761 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:10,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464872511] [2020-12-22 05:37:10,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:10,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:37:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419539760] [2020-12-22 05:37:10,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:37:10,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:37:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:10,777 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-22 05:37:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:11,126 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-22 05:37:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:37:11,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 05:37:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:11,129 INFO L225 Difference]: With dead ends: 42 [2020-12-22 05:37:11,129 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 05:37:11,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:37:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 05:37:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-12-22 05:37:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:37:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 05:37:11,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2020-12-22 05:37:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:11,138 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 05:37:11,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:37:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 05:37:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:37:11,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:11,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:11,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:37:11,353 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2020-12-22 05:37:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:11,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207862927] [2020-12-22 05:37:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207862927] [2020-12-22 05:37:11,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:11,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:37:11,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697176212] [2020-12-22 05:37:11,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:37:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:37:11,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:37:11,411 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-12-22 05:37:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:11,428 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-22 05:37:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:37:11,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 05:37:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:11,430 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:37:11,430 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 05:37:11,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:37:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 05:37:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 05:37:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:37:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 05:37:11,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-22 05:37:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:11,437 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 05:37:11,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:37:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 05:37:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:37:11,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:11,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:11,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 05:37:11,439 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2020-12-22 05:37:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975202464] [2020-12-22 05:37:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:11,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:11,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869586194] [2020-12-22 05:37:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:37:11,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:11,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:11,795 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 05:37:11,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:11,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:11,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:37:11,895 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:11,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:11,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:37:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:11,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975202464] [2020-12-22 05:37:11,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:11,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869586194] [2020-12-22 05:37:11,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:11,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:37:11,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005940493] [2020-12-22 05:37:11,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:37:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:11,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:37:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:37:11,955 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 9 states. [2020-12-22 05:37:12,271 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 05:37:12,404 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-12-22 05:37:12,534 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 20 [2020-12-22 05:37:15,637 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 05:37:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:18,375 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-12-22 05:37:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:37:18,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 05:37:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:18,377 INFO L225 Difference]: With dead ends: 52 [2020-12-22 05:37:18,377 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 05:37:18,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:37:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 05:37:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-12-22 05:37:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:37:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-22 05:37:18,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 11 [2020-12-22 05:37:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:18,395 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-22 05:37:18,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:37:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-22 05:37:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:37:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:18,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:18,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:18,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2020-12-22 05:37:18,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:18,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636230507] [2020-12-22 05:37:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:18,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:18,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639613496] [2020-12-22 05:37:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 05:37:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:22,853 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-22 05:37:22,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:22,994 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:23,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:25,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636230507] [2020-12-22 05:37:25,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:25,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639613496] [2020-12-22 05:37:25,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:25,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:37:25,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833288071] [2020-12-22 05:37:25,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:37:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:37:25,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:37:25,073 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 8 states. [2020-12-22 05:37:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:25,512 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-12-22 05:37:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:37:25,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-22 05:37:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:25,515 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:37:25,516 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 05:37:25,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:37:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 05:37:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2020-12-22 05:37:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 05:37:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-12-22 05:37:25,532 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 13 [2020-12-22 05:37:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:25,533 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-12-22 05:37:25,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:37:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-12-22 05:37:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:37:25,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:25,534 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:25,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:25,750 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2020-12-22 05:37:25,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:25,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12832655] [2020-12-22 05:37:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:25,765 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:25,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461654291] [2020-12-22 05:37:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:37:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:25,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12832655] [2020-12-22 05:37:25,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:25,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461654291] [2020-12-22 05:37:25,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:25,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:37:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770434130] [2020-12-22 05:37:25,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:37:25,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:37:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:37:25,849 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 5 states. [2020-12-22 05:37:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:25,878 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-12-22 05:37:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:37:25,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 05:37:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:25,879 INFO L225 Difference]: With dead ends: 49 [2020-12-22 05:37:25,880 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:37:25,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:37:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 05:37:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 05:37:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-12-22 05:37:25,887 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 14 [2020-12-22 05:37:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:25,888 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-12-22 05:37:25,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:37:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-12-22 05:37:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:37:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:25,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:26,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:26,103 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:26,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2020-12-22 05:37:26,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:26,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450507596] [2020-12-22 05:37:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:26,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:26,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637549254] [2020-12-22 05:37:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 05:37:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450507596] [2020-12-22 05:37:26,347 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:26,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637549254] [2020-12-22 05:37:26,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:26,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:37:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806319487] [2020-12-22 05:37:26,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:37:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:26,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:37:26,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:37:26,349 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 8 states. [2020-12-22 05:37:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:28,771 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-12-22 05:37:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:37:28,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-22 05:37:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:28,773 INFO L225 Difference]: With dead ends: 53 [2020-12-22 05:37:28,773 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 05:37:28,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:37:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 05:37:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-12-22 05:37:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 05:37:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-22 05:37:28,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2020-12-22 05:37:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:28,782 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-22 05:37:28,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:37:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-22 05:37:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:37:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:28,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:28,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 05:37:28,996 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2020-12-22 05:37:28,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:28,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306578140] [2020-12-22 05:37:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:29,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:29,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569785410] [2020-12-22 05:37:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:37:29,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:29,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306578140] [2020-12-22 05:37:29,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:29,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569785410] [2020-12-22 05:37:29,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:29,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:37:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75003214] [2020-12-22 05:37:29,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:37:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:37:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:37:29,249 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 7 states. [2020-12-22 05:37:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:29,716 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-12-22 05:37:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:37:29,717 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 05:37:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:29,718 INFO L225 Difference]: With dead ends: 62 [2020-12-22 05:37:29,718 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 05:37:29,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:37:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 05:37:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-12-22 05:37:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 05:37:29,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-12-22 05:37:29,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 15 [2020-12-22 05:37:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:29,736 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-12-22 05:37:29,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:37:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-12-22 05:37:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:37:29,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:29,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:29,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:29,942 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2020-12-22 05:37:29,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:29,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955675905] [2020-12-22 05:37:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:29,954 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:29,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338522030] [2020-12-22 05:37:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:30,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 05:37:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:32,228 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2020-12-22 05:37:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:32,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955675905] [2020-12-22 05:37:32,368 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:32,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338522030] [2020-12-22 05:37:32,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:32,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:37:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197610175] [2020-12-22 05:37:32,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:37:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:37:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:37:32,378 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 8 states. [2020-12-22 05:37:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:37,081 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-12-22 05:37:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:37:37,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-22 05:37:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:37,084 INFO L225 Difference]: With dead ends: 73 [2020-12-22 05:37:37,084 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 05:37:37,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:37:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 05:37:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2020-12-22 05:37:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 05:37:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-22 05:37:37,093 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 15 [2020-12-22 05:37:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:37,094 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-22 05:37:37,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:37:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-22 05:37:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:37:37,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:37,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:37,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:37,309 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2020-12-22 05:37:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:37,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364081108] [2020-12-22 05:37:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:37,321 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:37,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735088708] [2020-12-22 05:37:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 05:37:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:37,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364081108] [2020-12-22 05:37:37,465 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:37,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735088708] [2020-12-22 05:37:37,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:37:37,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:37:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823871627] [2020-12-22 05:37:37,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:37:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:37:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:37,468 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 6 states. [2020-12-22 05:37:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:37,649 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-12-22 05:37:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:37:37,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-22 05:37:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:37,650 INFO L225 Difference]: With dead ends: 87 [2020-12-22 05:37:37,650 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 05:37:37,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:37:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 05:37:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-12-22 05:37:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 05:37:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-12-22 05:37:37,661 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 16 [2020-12-22 05:37:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:37,661 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-12-22 05:37:37,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:37:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-12-22 05:37:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:37:37,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:37,662 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:37,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 05:37:37,877 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2020-12-22 05:37:37,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:37,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203445095] [2020-12-22 05:37:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:37,889 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:37,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813002629] [2020-12-22 05:37:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:37,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:37,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:37:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:37,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203445095] [2020-12-22 05:37:37,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:37,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813002629] [2020-12-22 05:37:37,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:37,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:37:37,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472050970] [2020-12-22 05:37:37,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:37:37,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:37:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:37:37,991 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 6 states. [2020-12-22 05:37:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:38,029 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2020-12-22 05:37:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:37:38,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-22 05:37:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:38,044 INFO L225 Difference]: With dead ends: 84 [2020-12-22 05:37:38,044 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 05:37:38,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:37:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 05:37:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-12-22 05:37:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:37:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-12-22 05:37:38,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2020-12-22 05:37:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:38,052 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-12-22 05:37:38,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:37:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-12-22 05:37:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:37:38,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:38,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:38,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:38,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2020-12-22 05:37:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:38,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029209227] [2020-12-22 05:37:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:38,292 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:38,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557572387] [2020-12-22 05:37:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:37:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:38,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 05:37:38,577 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 05:37:38,692 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 05:37:38,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:38,702 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 05:37:38,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 05:37:38,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 05:37:38,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 05:37:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:38,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029209227] [2020-12-22 05:37:38,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:38,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557572387] [2020-12-22 05:37:38,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:38,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:37:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436154160] [2020-12-22 05:37:38,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:37:38,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:37:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:37:38,790 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 10 states. [2020-12-22 05:37:38,997 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 05:37:42,133 WARN L197 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 05:37:42,382 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-12-22 05:37:43,863 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 05:37:44,150 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 05:37:44,354 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-12-22 05:37:44,599 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2020-12-22 05:37:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:44,875 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-12-22 05:37:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:37:44,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 05:37:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:44,877 INFO L225 Difference]: With dead ends: 78 [2020-12-22 05:37:44,877 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 05:37:44,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-12-22 05:37:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 05:37:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 33. [2020-12-22 05:37:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 05:37:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-22 05:37:44,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2020-12-22 05:37:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:44,884 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-22 05:37:44,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:37:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-22 05:37:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 05:37:44,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:44,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:45,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:45,098 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1948915952, now seen corresponding path program 2 times [2020-12-22 05:37:45,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:45,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566303405] [2020-12-22 05:37:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:45,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:45,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823146683] [2020-12-22 05:37:45,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:45,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-22 05:37:45,161 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:37:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:37:45,184 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:37:45,255 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:37:45,255 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:37:45,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:37:45,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:37:45 BoogieIcfgContainer [2020-12-22 05:37:45,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:37:45,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:37:45,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:37:45,497 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:37:45,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:37:09" (3/4) ... [2020-12-22 05:37:45,500 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:37:45,586 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c-witness.graphml [2020-12-22 05:37:45,586 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:37:45,588 INFO L168 Benchmark]: Toolchain (without parser) took 36737.26 ms. Allocated memory was 161.5 MB in the beginning and 221.2 MB in the end (delta: 59.8 MB). Free memory was 137.4 MB in the beginning and 101.4 MB in the end (delta: 35.9 MB). Peak memory consumption was 97.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,588 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 161.5 MB. Free memory was 133.1 MB in the beginning and 133.0 MB in the end (delta: 104.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:37:45,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.96 ms. Allocated memory is still 161.5 MB. Free memory was 137.0 MB in the beginning and 127.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,589 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.35 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 125.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,593 INFO L168 Benchmark]: Boogie Preprocessor took 47.96 ms. Allocated memory is still 161.5 MB. Free memory was 125.4 MB in the beginning and 124.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,594 INFO L168 Benchmark]: RCFGBuilder took 506.16 ms. Allocated memory is still 161.5 MB. Free memory was 124.2 MB in the beginning and 109.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,594 INFO L168 Benchmark]: TraceAbstraction took 35624.49 ms. Allocated memory was 161.5 MB in the beginning and 221.2 MB in the end (delta: 59.8 MB). Free memory was 108.9 MB in the beginning and 104.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,595 INFO L168 Benchmark]: Witness Printer took 89.67 ms. Allocated memory is still 221.2 MB. Free memory was 104.1 MB in the beginning and 101.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:37:45,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 161.5 MB. Free memory was 133.1 MB in the beginning and 133.0 MB in the end (delta: 104.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.96 ms. Allocated memory is still 161.5 MB. Free memory was 137.0 MB in the beginning and 127.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 80.35 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 125.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.96 ms. Allocated memory is still 161.5 MB. Free memory was 125.4 MB in the beginning and 124.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.16 ms. Allocated memory is still 161.5 MB. Free memory was 124.2 MB in the beginning and 109.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 35624.49 ms. Allocated memory was 161.5 MB in the beginning and 221.2 MB in the end (delta: 59.8 MB). Free memory was 108.9 MB in the beginning and 104.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. * Witness Printer took 89.67 ms. Allocated memory is still 221.2 MB. Free memory was 104.1 MB in the beginning and 101.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=3] [L14] reach_error() VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.4s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 21.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 775 SDslu, 542 SDs, 0 SdLazy, 706 SolverSat, 201 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 14.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 159 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 147 ConstructedInterpolants, 2 QuantifiedInterpolants, 19152 SizeOfPredicates, 79 NumberOfNonLiveVariables, 873 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 13/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...