/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/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:56:43,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:56:43,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:56:43,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:56:43,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:56:43,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:56:43,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:56:43,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:56:43,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:56:43,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:56:43,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:56:43,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:56:43,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:56:43,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:56:43,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:56:43,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:56:43,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:56:43,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:56:43,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:56:43,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:56:43,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:56:43,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:56:43,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:56:43,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:56:43,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:56:43,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:56:43,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:56:43,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:56:43,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:56:43,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:56:43,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:56:43,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:56:43,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:56:43,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:56:43,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:56:43,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:56:43,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:56:43,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:56:43,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:56:43,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:56:43,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:56:43,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:56:43,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:56:43,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:56:43,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:56:43,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:56:43,456 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:56:43,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:56:43,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:56:43,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:56:43,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:56:43,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:56:43,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:56:43,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:56:43,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:56:43,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:56:43,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:56:43,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:56:43,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:56:43,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:56:43,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:56:43,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:56:43,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:56:43,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:56:43,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:56:43,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:56:43,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:56:43,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:56:43,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:56:43,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:56:43,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:56:43,916 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:56:43,917 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:56:43,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2020-12-21 21:56:44,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4075a4ea6/cf22f3f95280489a884ebeae4d16c43a/FLAG6c6633819 [2020-12-21 21:56:44,625 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:56:44,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2020-12-21 21:56:44,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4075a4ea6/cf22f3f95280489a884ebeae4d16c43a/FLAG6c6633819 [2020-12-21 21:56:44,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4075a4ea6/cf22f3f95280489a884ebeae4d16c43a [2020-12-21 21:56:44,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:56:44,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:56:44,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:44,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:56:44,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:56:44,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:44,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b71865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44, skipping insertion in model container [2020-12-21 21:56:44,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:44,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:56:44,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:56:44,887 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/reducercommutativity/rangesum.i[1544,1557] [2020-12-21 21:56:44,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:44,900 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:56:44,939 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/reducercommutativity/rangesum.i[1544,1557] [2020-12-21 21:56:44,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:56:44,959 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:56:44,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44 WrapperNode [2020-12-21 21:56:44,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:56:44,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:44,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:56:44,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:56:44,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:44,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:56:45,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:56:45,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:56:45,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:56:45,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (1/1) ... [2020-12-21 21:56:45,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:56:45,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:56:45,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:56:45,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:56:45,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (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 21:56:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:56:45,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:56:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:56:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:56:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:56:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:56:45,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:56:45,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:56:45,842 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:56:45,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:45 BoogieIcfgContainer [2020-12-21 21:56:45,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:56:45,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:56:45,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:56:45,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:56:45,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:56:44" (1/3) ... [2020-12-21 21:56:45,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7180da15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:45, skipping insertion in model container [2020-12-21 21:56:45,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:56:44" (2/3) ... [2020-12-21 21:56:45,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7180da15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:56:45, skipping insertion in model container [2020-12-21 21:56:45,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:45" (3/3) ... [2020-12-21 21:56:45,854 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-12-21 21:56:45,862 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:56:45,867 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:56:45,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:56:45,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:56:45,920 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:56:45,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:56:45,920 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:56:45,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:56:45,920 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:56:45,921 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:56:45,921 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:56:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-21 21:56:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 21:56:45,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:45,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:45,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2020-12-21 21:56:45,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:45,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913742827] [2020-12-21 21:56:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:46,175 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 21:56:46,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913742827] [2020-12-21 21:56:46,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:46,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:56:46,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357317093] [2020-12-21 21:56:46,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:56:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:56:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:56:46,200 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-21 21:56:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:46,222 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-12-21 21:56:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:56:46,224 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-12-21 21:56:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:46,235 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:56:46,235 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:56:46,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:56:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:56:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-21 21:56:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:56:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-21 21:56:46,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-12-21 21:56:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:46,278 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-21 21:56:46,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:56:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-21 21:56:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 21:56:46,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:46,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:46,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:56:46,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2020-12-21 21:56:46,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:46,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637387962] [2020-12-21 21:56:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:46,356 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 21:56:46,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637387962] [2020-12-21 21:56:46,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:46,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:56:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839091296] [2020-12-21 21:56:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:46,361 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-21 21:56:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:46,423 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-12-21 21:56:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:46,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-21 21:56:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:46,425 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:56:46,425 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:56:46,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:56:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:56:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-21 21:56:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:56:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-12-21 21:56:46,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-12-21 21:56:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:46,433 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-12-21 21:56:46,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-12-21 21:56:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:56:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:46,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:46,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:56:46,435 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -230084431, now seen corresponding path program 1 times [2020-12-21 21:56:46,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:46,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664542861] [2020-12-21 21:56:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:46,459 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:46,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117531068] [2020-12-21 21:56:46,460 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 21:56:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:56:46,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:56:46,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664542861] [2020-12-21 21:56:46,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:46,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117531068] [2020-12-21 21:56:46,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:46,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:56:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134185934] [2020-12-21 21:56:46,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:56:46,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:56:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:56:46,585 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-12-21 21:56:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:46,650 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2020-12-21 21:56:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:56:46,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-21 21:56:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:46,652 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:56:46,652 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:56:46,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:56:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:56:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-21 21:56:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:56:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2020-12-21 21:56:46,662 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 20 [2020-12-21 21:56:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:46,663 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2020-12-21 21:56:46,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:56:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2020-12-21 21:56:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:56:46,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:46,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:46,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:56:46,881 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 708198959, now seen corresponding path program 1 times [2020-12-21 21:56:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:46,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389960704] [2020-12-21 21:56:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:56:46,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389960704] [2020-12-21 21:56:46,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:46,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:56:46,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188287301] [2020-12-21 21:56:46,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:46,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:46,958 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand 4 states. [2020-12-21 21:56:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:47,069 INFO L93 Difference]: Finished difference Result 79 states and 114 transitions. [2020-12-21 21:56:47,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:47,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-21 21:56:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:47,071 INFO L225 Difference]: With dead ends: 79 [2020-12-21 21:56:47,071 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 21:56:47,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:56:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 21:56:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-21 21:56:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:56:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-21 21:56:47,081 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 20 [2020-12-21 21:56:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:47,081 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-21 21:56:47,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-21 21:56:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:56:47,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:47,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:47,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:56:47,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:47,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1766254929, now seen corresponding path program 1 times [2020-12-21 21:56:47,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:47,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82190974] [2020-12-21 21:56:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:56:47,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82190974] [2020-12-21 21:56:47,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:47,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:56:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308402696] [2020-12-21 21:56:47,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:47,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:47,173 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 4 states. [2020-12-21 21:56:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:47,253 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-12-21 21:56:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:47,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-12-21 21:56:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:47,254 INFO L225 Difference]: With dead ends: 63 [2020-12-21 21:56:47,255 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:56:47,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:56:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:56:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-21 21:56:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:56:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-12-21 21:56:47,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 29 [2020-12-21 21:56:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:47,263 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-12-21 21:56:47,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-12-21 21:56:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:56:47,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:47,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:47,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 21:56:47,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:47,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1224510417, now seen corresponding path program 1 times [2020-12-21 21:56:47,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:47,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950624499] [2020-12-21 21:56:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:56:47,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950624499] [2020-12-21 21:56:47,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:47,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-21 21:56:47,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549517628] [2020-12-21 21:56:47,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:56:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:56:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:56:47,397 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 8 states. [2020-12-21 21:56:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:47,463 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2020-12-21 21:56:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:56:47,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-21 21:56:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:47,465 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:56:47,465 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:56:47,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:56:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:56:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 72. [2020-12-21 21:56:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:56:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-12-21 21:56:47,479 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 31 [2020-12-21 21:56:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:47,479 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-12-21 21:56:47,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:56:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-12-21 21:56:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:56:47,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:47,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:47,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 21:56:47,481 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -943608246, now seen corresponding path program 1 times [2020-12-21 21:56:47,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:47,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587512996] [2020-12-21 21:56:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:47,506 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:47,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284997384] [2020-12-21 21:56:47,507 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 21:56:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:56:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:56:47,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587512996] [2020-12-21 21:56:47,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284997384] [2020-12-21 21:56:47,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:47,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 21:56:47,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126039660] [2020-12-21 21:56:47,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:56:47,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:56:47,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:56:47,660 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 4 states. [2020-12-21 21:56:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:47,718 INFO L93 Difference]: Finished difference Result 141 states and 191 transitions. [2020-12-21 21:56:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:56:47,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-12-21 21:56:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:47,721 INFO L225 Difference]: With dead ends: 141 [2020-12-21 21:56:47,721 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:56:47,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 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 21:56:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:56:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-21 21:56:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:56:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-12-21 21:56:47,732 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 34 [2020-12-21 21:56:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:47,732 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-12-21 21:56:47,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:56:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-12-21 21:56:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:56:47,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:47,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:47,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:47,950 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash 772319464, now seen corresponding path program 2 times [2020-12-21 21:56:47,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:47,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689589551] [2020-12-21 21:56:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:47,996 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:47,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129830037] [2020-12-21 21:56:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:56:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:56:48,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689589551] [2020-12-21 21:56:48,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:48,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129830037] [2020-12-21 21:56:48,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:48,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:56:48,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968760397] [2020-12-21 21:56:48,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:56:48,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:56:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:56:48,142 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 5 states. [2020-12-21 21:56:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:48,265 INFO L93 Difference]: Finished difference Result 154 states and 210 transitions. [2020-12-21 21:56:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:56:48,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-12-21 21:56:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:48,267 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:56:48,267 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:56:48,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 21:56:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:56:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2020-12-21 21:56:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:56:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-12-21 21:56:48,280 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 36 [2020-12-21 21:56:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:48,280 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-12-21 21:56:48,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:56:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-12-21 21:56:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:56:48,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:48,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:48,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:48,497 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 3 times [2020-12-21 21:56:48,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:48,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310177804] [2020-12-21 21:56:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:48,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:48,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769063435] [2020-12-21 21:56:48,546 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 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 21:56:48,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:56:48,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:56:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:48,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:56:48,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:56:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-21 21:56:48,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310177804] [2020-12-21 21:56:48,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:48,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769063435] [2020-12-21 21:56:48,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:56:48,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 21:56:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232780836] [2020-12-21 21:56:48,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:56:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:56:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:56:48,849 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 6 states. [2020-12-21 21:56:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:49,049 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2020-12-21 21:56:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:56:49,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-12-21 21:56:49,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:49,051 INFO L225 Difference]: With dead ends: 209 [2020-12-21 21:56:49,051 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:56:49,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:56:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:56:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2020-12-21 21:56:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 21:56:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2020-12-21 21:56:49,066 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 45 [2020-12-21 21:56:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:49,067 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2020-12-21 21:56:49,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:56:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2020-12-21 21:56:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:56:49,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:49,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:49,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:49,281 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1574802954, now seen corresponding path program 1 times [2020-12-21 21:56:49,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:49,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303712410] [2020-12-21 21:56:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:49,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:49,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388347581] [2020-12-21 21:56:49,297 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 21:56:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:56:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:56:49,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303712410] [2020-12-21 21:56:49,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:49,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388347581] [2020-12-21 21:56:49,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:49,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:56:49,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064708196] [2020-12-21 21:56:49,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:56:49,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:56:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:56:49,561 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand 9 states. [2020-12-21 21:56:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:49,739 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2020-12-21 21:56:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:56:49,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-12-21 21:56:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:49,741 INFO L225 Difference]: With dead ends: 229 [2020-12-21 21:56:49,742 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 21:56:49,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:56:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 21:56:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-21 21:56:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-21 21:56:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2020-12-21 21:56:49,759 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 45 [2020-12-21 21:56:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:49,759 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2020-12-21 21:56:49,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:56:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2020-12-21 21:56:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:56:49,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:49,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:49,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:56:49,975 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1426428756, now seen corresponding path program 2 times [2020-12-21 21:56:49,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:49,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229862700] [2020-12-21 21:56:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:49,997 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:49,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862366491] [2020-12-21 21:56:49,997 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 21:56:50,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:56:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 21:56:50,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229862700] [2020-12-21 21:56:50,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:50,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862366491] [2020-12-21 21:56:50,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:50,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:56:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170258102] [2020-12-21 21:56:50,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:56:50,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:56:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:56:50,296 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand 9 states. [2020-12-21 21:56:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:50,505 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2020-12-21 21:56:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:56:50,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-21 21:56:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:50,508 INFO L225 Difference]: With dead ends: 171 [2020-12-21 21:56:50,508 INFO L226 Difference]: Without dead ends: 153 [2020-12-21 21:56:50,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:56:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-21 21:56:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2020-12-21 21:56:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-21 21:56:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2020-12-21 21:56:50,525 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 47 [2020-12-21 21:56:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:50,527 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2020-12-21 21:56:50,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:56:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2020-12-21 21:56:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:56:50,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:50,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:50,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:50,734 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 185085973, now seen corresponding path program 1 times [2020-12-21 21:56:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:50,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75682575] [2020-12-21 21:56:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:50,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:50,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677368805] [2020-12-21 21:56:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:56:50,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:56:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:56:51,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75682575] [2020-12-21 21:56:51,035 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:51,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677368805] [2020-12-21 21:56:51,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:51,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:56:51,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678797967] [2020-12-21 21:56:51,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:56:51,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:56:51,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:56:51,039 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 8 states. [2020-12-21 21:56:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:51,185 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2020-12-21 21:56:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:56:51,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-21 21:56:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:51,187 INFO L225 Difference]: With dead ends: 181 [2020-12-21 21:56:51,187 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:56:51,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:56:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:56:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-21 21:56:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 21:56:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2020-12-21 21:56:51,200 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 53 [2020-12-21 21:56:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:51,200 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2020-12-21 21:56:51,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:56:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2020-12-21 21:56:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:56:51,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:51,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:51,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:51,416 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -100779465, now seen corresponding path program 2 times [2020-12-21 21:56:51,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666209389] [2020-12-21 21:56:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:51,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:51,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425214824] [2020-12-21 21:56:51,433 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 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 21:56:51,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:56:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:56:51,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:56:51,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:56:51,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:56:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:56:51,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666209389] [2020-12-21 21:56:51,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:56:51,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425214824] [2020-12-21 21:56:51,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:56:51,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:56:51,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291856067] [2020-12-21 21:56:51,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:56:51,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:56:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:56:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:56:51,709 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand 9 states. [2020-12-21 21:56:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:56:52,079 INFO L93 Difference]: Finished difference Result 389 states and 486 transitions. [2020-12-21 21:56:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:56:52,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-12-21 21:56:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:56:52,082 INFO L225 Difference]: With dead ends: 389 [2020-12-21 21:56:52,082 INFO L226 Difference]: Without dead ends: 276 [2020-12-21 21:56:52,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:56:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-21 21:56:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 215. [2020-12-21 21:56:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-21 21:56:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 263 transitions. [2020-12-21 21:56:52,103 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 263 transitions. Word has length 55 [2020-12-21 21:56:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:56:52,104 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 263 transitions. [2020-12-21 21:56:52,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:56:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 263 transitions. [2020-12-21 21:56:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:56:52,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:56:52,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:56:52,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:56:52,320 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:56:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:56:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2020-12-21 21:56:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:56:52,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066675422] [2020-12-21 21:56:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:56:52,336 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:56:52,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888786434] [2020-12-21 21:56:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:56:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 21:56:52,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 21:56:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 21:56:52,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 21:56:52,741 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 21:56:52,741 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 21:56:52,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:56:53,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 09:56:53 BoogieIcfgContainer [2020-12-21 21:56:53,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 21:56:53,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 21:56:53,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 21:56:53,066 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 21:56:53,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:56:45" (3/4) ... [2020-12-21 21:56:53,069 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-21 21:56:53,166 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/reducercommutativity/rangesum.i-witness.graphml [2020-12-21 21:56:53,166 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 21:56:53,168 INFO L168 Benchmark]: Toolchain (without parser) took 8499.44 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 131.0 MB in the beginning and 111.4 MB in the end (delta: 19.6 MB). Peak memory consumption was 54.9 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,168 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 21:56:53,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.77 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 120.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.57 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 118.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,170 INFO L168 Benchmark]: Boogie Preprocessor took 76.40 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 117.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,178 INFO L168 Benchmark]: RCFGBuilder took 730.69 ms. Allocated memory is still 155.2 MB. Free memory was 117.2 MB in the beginning and 129.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,179 INFO L168 Benchmark]: TraceAbstraction took 7214.27 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 129.2 MB in the beginning and 117.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,180 INFO L168 Benchmark]: Witness Printer took 100.61 ms. Allocated memory is still 189.8 MB. Free memory was 116.6 MB in the beginning and 111.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-21 21:56:53,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.77 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 120.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 71.57 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 118.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.40 ms. Allocated memory is still 155.2 MB. Free memory was 118.7 MB in the beginning and 117.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 730.69 ms. Allocated memory is still 155.2 MB. Free memory was 117.2 MB in the beginning and 129.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7214.27 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 129.2 MB in the beginning and 117.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. * Witness Printer took 100.61 ms. Allocated memory is still 189.8 MB. Free memory was 116.6 MB in the beginning and 111.4 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L17] int i; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [N=3] [L57] COND TRUE i N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L64] reach_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 351 SDtfs, 624 SDslu, 466 SDs, 0 SdLazy, 818 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 367 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 168 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 506 NumberOfCodeBlocks, 503 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 438 ConstructedInterpolants, 0 QuantifiedInterpolants, 48392 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1390 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 179/213 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...