/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/array-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:29:01,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:29:01,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:29:01,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:29:01,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:29:01,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:29:01,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:29:01,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:29:01,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:29:01,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:29:01,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:29:01,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:29:01,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:29:01,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:29:01,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:29:01,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:29:01,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:29:01,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:29:01,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:29:01,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:29:01,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:29:01,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:29:01,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:29:01,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:29:01,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:29:01,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:29:01,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:29:01,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:29:01,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:29:01,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:29:01,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:29:01,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:29:01,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:29:01,286 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:29:01,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:29:01,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:29:01,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:29:01,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:29:01,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:29:01,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:29:01,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:29:01,289 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:29:01,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:29:01,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:29:01,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:29:01,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:29:01,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:29:01,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:29:01,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:29:01,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:29:01,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:29:01,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:29:01,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:29:01,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:29:01,293 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:29:01,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:29:01,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:29:01,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:29:01,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:29:01,769 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:29:01,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-3-u.c [2020-12-21 22:29:01,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82302e209/03f3fa5fce434b1aadad283c1516f7ec/FLAG4484e89eb [2020-12-21 22:29:02,547 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:29:02,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-3-u.c [2020-12-21 22:29:02,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82302e209/03f3fa5fce434b1aadad283c1516f7ec/FLAG4484e89eb [2020-12-21 22:29:02,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82302e209/03f3fa5fce434b1aadad283c1516f7ec [2020-12-21 22:29:02,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:29:02,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:29:02,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:29:02,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:29:02,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:29:02,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:02" (1/1) ... [2020-12-21 22:29:02,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576faa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:02, skipping insertion in model container [2020-12-21 22:29:02,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:29:02" (1/1) ... [2020-12-21 22:29:02,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:29:02,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:29:03,065 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/array-multidimensional/init-3-u.c[320,333] [2020-12-21 22:29:03,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:29:03,101 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:29:03,119 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/array-multidimensional/init-3-u.c[320,333] [2020-12-21 22:29:03,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:29:03,152 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:29:03,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03 WrapperNode [2020-12-21 22:29:03,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:29:03,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:29:03,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:29:03,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:29:03,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:29:03,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:29:03,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:29:03,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:29:03,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (1/1) ... [2020-12-21 22:29:03,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:29:03,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:29:03,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:29:03,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:29:03,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (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 [2020-12-21 22:29:03,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:29:03,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:29:03,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:29:03,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:29:03,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:29:03,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:29:03,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:29:03,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:29:03,837 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:29:03,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:03 BoogieIcfgContainer [2020-12-21 22:29:03,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:29:03,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:29:03,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:29:03,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:29:03,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:29:02" (1/3) ... [2020-12-21 22:29:03,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523a4124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:03, skipping insertion in model container [2020-12-21 22:29:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:29:03" (2/3) ... [2020-12-21 22:29:03,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523a4124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:29:03, skipping insertion in model container [2020-12-21 22:29:03,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:29:03" (3/3) ... [2020-12-21 22:29:03,861 INFO L111 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2020-12-21 22:29:03,884 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:29:03,899 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:29:03,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:29:04,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:29:04,030 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:29:04,030 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:29:04,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:29:04,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:29:04,030 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:29:04,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:29:04,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:29:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:29:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:29:04,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:04,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:04,070 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2020-12-21 22:29:04,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:04,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187155851] [2020-12-21 22:29:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:04,271 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:04,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468572147] [2020-12-21 22:29:04,273 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 [2020-12-21 22:29:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:29:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:04,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187155851] [2020-12-21 22:29:04,546 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468572147] [2020-12-21 22:29:04,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:29:04,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320001271] [2020-12-21 22:29:04,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:29:04,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:04,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:29:04,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:29:04,580 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:29:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:04,618 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2020-12-21 22:29:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:29:04,620 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 22:29:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:04,650 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:29:04,651 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:29:04,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:29:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:29:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:29:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:29:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-12-21 22:29:04,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2020-12-21 22:29:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:04,709 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-12-21 22:29:04,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:29:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-12-21 22:29:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 22:29:04,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:04,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:29:04,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2020-12-21 22:29:04,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:04,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532800083] [2020-12-21 22:29:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:04,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:04,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973873910] [2020-12-21 22:29:04,945 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 [2020-12-21 22:29:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:05,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:05,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532800083] [2020-12-21 22:29:05,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:05,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973873910] [2020-12-21 22:29:05,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:05,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:29:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536475342] [2020-12-21 22:29:05,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:29:05,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:29:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:29:05,085 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 3 states. [2020-12-21 22:29:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:05,170 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-12-21 22:29:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:29:05,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 22:29:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:05,177 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:29:05,177 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 22:29:05,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:29:05,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 22:29:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-12-21 22:29:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:29:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-21 22:29:05,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2020-12-21 22:29:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:05,193 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-21 22:29:05,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:29:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-21 22:29:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:29:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:05,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:05,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:05,398 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2020-12-21 22:29:05,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:05,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843353488] [2020-12-21 22:29:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:05,412 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:05,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414858180] [2020-12-21 22:29:05,413 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 [2020-12-21 22:29:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:05,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843353488] [2020-12-21 22:29:05,518 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:05,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414858180] [2020-12-21 22:29:05,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:05,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312507119] [2020-12-21 22:29:05,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:05,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:05,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:05,521 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-21 22:29:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:05,589 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-21 22:29:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:05,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-21 22:29:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:05,591 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:29:05,591 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:29:05,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:29:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-12-21 22:29:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:29:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-21 22:29:05,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2020-12-21 22:29:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:05,599 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-21 22:29:05,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-21 22:29:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:29:05,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:05,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:05,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:05,817 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2020-12-21 22:29:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:05,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267100236] [2020-12-21 22:29:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:05,838 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:05,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31265829] [2020-12-21 22:29:05,844 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 [2020-12-21 22:29:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:05,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267100236] [2020-12-21 22:29:05,935 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:05,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31265829] [2020-12-21 22:29:05,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:05,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923800100] [2020-12-21 22:29:05,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:05,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:05,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:05,939 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-12-21 22:29:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:06,014 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-21 22:29:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:06,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-21 22:29:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:06,016 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:29:06,016 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:29:06,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:29:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-21 22:29:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:29:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-21 22:29:06,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2020-12-21 22:29:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:06,036 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-21 22:29:06,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-21 22:29:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:29:06,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:06,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:06,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:06,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2020-12-21 22:29:06,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:06,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635525768] [2020-12-21 22:29:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:06,270 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:06,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433770498] [2020-12-21 22:29:06,270 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 [2020-12-21 22:29:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635525768] [2020-12-21 22:29:06,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433770498] [2020-12-21 22:29:06,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:06,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982982725] [2020-12-21 22:29:06,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:06,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:06,451 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2020-12-21 22:29:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:06,539 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-12-21 22:29:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:06,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:29:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:06,541 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:29:06,541 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:29:06,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:29:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-21 22:29:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:29:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-21 22:29:06,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2020-12-21 22:29:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:06,550 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-21 22:29:06,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-21 22:29:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:29:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:06,551 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:06,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:06,767 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2020-12-21 22:29:06,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:06,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776885474] [2020-12-21 22:29:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:06,780 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:06,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836816871] [2020-12-21 22:29:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:06,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:06,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:29:06,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:29:06,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776885474] [2020-12-21 22:29:06,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:06,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836816871] [2020-12-21 22:29:06,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:06,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:29:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717353952] [2020-12-21 22:29:06,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:29:06,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:29:06,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:29:06,901 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-12-21 22:29:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:06,966 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-12-21 22:29:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:29:06,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 22:29:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:06,968 INFO L225 Difference]: With dead ends: 62 [2020-12-21 22:29:06,968 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 22:29:06,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:29:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 22:29:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-12-21 22:29:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:29:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-21 22:29:06,976 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-12-21 22:29:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:06,976 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-21 22:29:06,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:29:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-21 22:29:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:29:06,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:06,977 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:07,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:07,191 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2020-12-21 22:29:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:07,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728059362] [2020-12-21 22:29:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:07,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:07,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124477615] [2020-12-21 22:29:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:29:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:07,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:29:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728059362] [2020-12-21 22:29:07,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124477615] [2020-12-21 22:29:07,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:07,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:29:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721660533] [2020-12-21 22:29:07,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:07,337 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-21 22:29:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:07,402 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-12-21 22:29:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:07,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-21 22:29:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:07,407 INFO L225 Difference]: With dead ends: 65 [2020-12-21 22:29:07,407 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 22:29:07,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 22:29:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-12-21 22:29:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:29:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-21 22:29:07,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-12-21 22:29:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:07,430 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-21 22:29:07,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-21 22:29:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:29:07,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:07,432 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:07,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:07,646 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2020-12-21 22:29:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:07,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243846852] [2020-12-21 22:29:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:07,663 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:07,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014877858] [2020-12-21 22:29:07,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-21 22:29:07,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:07,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:07,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:29:07,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:29:07,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243846852] [2020-12-21 22:29:07,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:07,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014877858] [2020-12-21 22:29:07,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:07,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:29:07,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901602490] [2020-12-21 22:29:07,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:29:07,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:07,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:29:07,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:07,839 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-12-21 22:29:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:08,010 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2020-12-21 22:29:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:29:08,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-21 22:29:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:08,012 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:29:08,012 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 22:29:08,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:29:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 22:29:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-12-21 22:29:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 22:29:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-12-21 22:29:08,029 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2020-12-21 22:29:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:08,029 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-12-21 22:29:08,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:29:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-12-21 22:29:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 22:29:08,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:08,031 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:08,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:29:08,246 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2020-12-21 22:29:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:08,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612903955] [2020-12-21 22:29:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:08,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:08,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667914471] [2020-12-21 22:29:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-12-21 22:29:08,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-21 22:29:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:29:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 22:29:08,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612903955] [2020-12-21 22:29:08,876 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:08,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667914471] [2020-12-21 22:29:08,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:08,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:29:08,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662367638] [2020-12-21 22:29:08,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:29:08,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:08,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:29:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:29:08,879 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2020-12-21 22:29:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:09,192 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2020-12-21 22:29:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:29:09,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-21 22:29:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:09,194 INFO L225 Difference]: With dead ends: 170 [2020-12-21 22:29:09,194 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 22:29:09,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:29:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 22:29:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-12-21 22:29:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 22:29:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-12-21 22:29:09,213 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 39 [2020-12-21 22:29:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:09,214 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-12-21 22:29:09,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:29:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-12-21 22:29:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:29:09,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:09,216 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:09,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:09,431 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -804241990, now seen corresponding path program 6 times [2020-12-21 22:29:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:09,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091789206] [2020-12-21 22:29:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:09,444 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:09,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291088918] [2020-12-21 22:29:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 22:29:09,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 22:29:09,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:29:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-21 22:29:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091789206] [2020-12-21 22:29:09,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291088918] [2020-12-21 22:29:09,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:29:09,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238160509] [2020-12-21 22:29:09,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:29:09,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:29:09,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:29:09,647 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 7 states. [2020-12-21 22:29:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:09,735 INFO L93 Difference]: Finished difference Result 196 states and 248 transitions. [2020-12-21 22:29:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:29:09,736 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-21 22:29:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:09,737 INFO L225 Difference]: With dead ends: 196 [2020-12-21 22:29:09,737 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 22:29:09,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:29:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 22:29:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-12-21 22:29:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-21 22:29:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-12-21 22:29:09,758 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 51 [2020-12-21 22:29:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:09,758 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-12-21 22:29:09,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:29:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-12-21 22:29:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 22:29:09,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:09,761 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:09,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:09,976 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 597276054, now seen corresponding path program 7 times [2020-12-21 22:29:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:09,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401435388] [2020-12-21 22:29:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:09,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:09,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40317765] [2020-12-21 22:29:09,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-21 22:29:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:29:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-21 22:29:10,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401435388] [2020-12-21 22:29:10,250 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:10,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40317765] [2020-12-21 22:29:10,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:10,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:29:10,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169864355] [2020-12-21 22:29:10,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:29:10,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:29:10,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:10,253 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 8 states. [2020-12-21 22:29:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:10,350 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2020-12-21 22:29:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:29:10,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-12-21 22:29:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:10,353 INFO L225 Difference]: With dead ends: 227 [2020-12-21 22:29:10,353 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:29:10,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:29:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2020-12-21 22:29:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 22:29:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2020-12-21 22:29:10,373 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 57 [2020-12-21 22:29:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:10,373 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2020-12-21 22:29:10,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:29:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2020-12-21 22:29:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:29:10,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:10,375 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:10,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:29:10,588 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1929398778, now seen corresponding path program 8 times [2020-12-21 22:29:10,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:10,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619963954] [2020-12-21 22:29:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:10,602 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:10,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108933489] [2020-12-21 22:29:10,603 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:10,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:10,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:29:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-21 22:29:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619963954] [2020-12-21 22:29:10,847 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:10,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108933489] [2020-12-21 22:29:10,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:10,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:29:10,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290408620] [2020-12-21 22:29:10,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:29:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:29:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:29:10,853 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 9 states. [2020-12-21 22:29:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:10,957 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2020-12-21 22:29:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:29:10,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-12-21 22:29:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:10,959 INFO L225 Difference]: With dead ends: 258 [2020-12-21 22:29:10,959 INFO L226 Difference]: Without dead ends: 151 [2020-12-21 22:29:10,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:29:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-21 22:29:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2020-12-21 22:29:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-21 22:29:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2020-12-21 22:29:10,984 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 63 [2020-12-21 22:29:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:10,984 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2020-12-21 22:29:10,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:29:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2020-12-21 22:29:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 22:29:10,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:10,986 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:11,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:11,201 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1555635498, now seen corresponding path program 9 times [2020-12-21 22:29:11,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:11,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840667613] [2020-12-21 22:29:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:11,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:11,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5041824] [2020-12-21 22:29:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:29:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:29:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-12-21 22:29:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840667613] [2020-12-21 22:29:11,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5041824] [2020-12-21 22:29:11,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:11,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:29:11,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740945609] [2020-12-21 22:29:11,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:29:11,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:29:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:29:11,796 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand 10 states. [2020-12-21 22:29:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:11,911 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2020-12-21 22:29:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:29:11,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-21 22:29:11,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:11,913 INFO L225 Difference]: With dead ends: 289 [2020-12-21 22:29:11,913 INFO L226 Difference]: Without dead ends: 168 [2020-12-21 22:29:11,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:29:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-21 22:29:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2020-12-21 22:29:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 22:29:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2020-12-21 22:29:11,933 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 69 [2020-12-21 22:29:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:11,934 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2020-12-21 22:29:11,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:29:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2020-12-21 22:29:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 22:29:11,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:11,935 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:12,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:29:12,149 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2132596282, now seen corresponding path program 10 times [2020-12-21 22:29:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:12,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758015599] [2020-12-21 22:29:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:12,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:12,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83918599] [2020-12-21 22:29:12,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:12,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:12,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:29:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-12-21 22:29:12,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758015599] [2020-12-21 22:29:12,543 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:12,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83918599] [2020-12-21 22:29:12,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:12,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 22:29:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140554132] [2020-12-21 22:29:12,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:29:12,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:29:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:29:12,547 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand 14 states. [2020-12-21 22:29:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:12,878 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2020-12-21 22:29:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:29:12,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-12-21 22:29:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:12,882 INFO L225 Difference]: With dead ends: 366 [2020-12-21 22:29:12,883 INFO L226 Difference]: Without dead ends: 253 [2020-12-21 22:29:12,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:29:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-21 22:29:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2020-12-21 22:29:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-21 22:29:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2020-12-21 22:29:12,913 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 75 [2020-12-21 22:29:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:12,914 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2020-12-21 22:29:12,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:29:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2020-12-21 22:29:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 22:29:12,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:12,915 INFO L422 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:13,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:13,130 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2020-12-21 22:29:13,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100194344] [2020-12-21 22:29:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:13,143 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:13,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319654110] [2020-12-21 22:29:13,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true