/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:43:50,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:43:50,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:43:50,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:43:50,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:43:50,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:43:50,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:43:50,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:43:50,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:43:50,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:43:50,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:43:50,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:43:50,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:43:50,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:43:50,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:43:50,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:43:50,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:43:50,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:43:50,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:43:50,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:43:50,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:43:50,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:43:50,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:43:50,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:43:50,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:43:50,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:43:50,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:43:50,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:43:50,711 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:43:50,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:43:50,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:43:50,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:43:50,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:43:50,775 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:43:50,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:43:50,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:43:50,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:43:50,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:43:50,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:43:50,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:43:50,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:43:50,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:43:50,778 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:43:50,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:43:50,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:43:50,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:43:50,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:43:50,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:43:50,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:43:50,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:43:50,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:43:50,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:43:50,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:43:50,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:43:50,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:43:50,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:43:50,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:43:50,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:43:50,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:43:51,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:43:51,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:43:51,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:43:51,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:43:51,258 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:43:51,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-11-06 22:43:51,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ad0200c/bcb540eae5af426c876c327cbf1ca842/FLAG4a1c311b3 [2020-11-06 22:43:51,996 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:43:51,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-11-06 22:43:52,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ad0200c/bcb540eae5af426c876c327cbf1ca842/FLAG4a1c311b3 [2020-11-06 22:43:52,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49ad0200c/bcb540eae5af426c876c327cbf1ca842 [2020-11-06 22:43:52,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:43:52,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:43:52,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:52,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:43:52,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:43:52,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@debc6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52, skipping insertion in model container [2020-11-06 22:43:52,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:43:52,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:43:52,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:52,634 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:43:52,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:43:52,680 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:43:52,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52 WrapperNode [2020-11-06 22:43:52,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:43:52,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:43:52,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:43:52,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:43:52,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (1/1) ... [2020-11-06 22:43:52,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:43:52,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:43:52,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:43:52,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:43:52,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (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 [2020-11-06 22:43:52,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:43:52,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:43:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:43:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-11-06 22:43:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-11-06 22:43:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:43:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:43:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:43:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:43:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:43:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:43:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:43:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:43:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:43:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:43:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:43:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:43:53,330 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:43:53,330 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:43:53,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53 BoogieIcfgContainer [2020-11-06 22:43:53,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:43:53,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:43:53,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:43:53,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:43:53,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:43:52" (1/3) ... [2020-11-06 22:43:53,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e63547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2020-11-06 22:43:53,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:43:52" (2/3) ... [2020-11-06 22:43:53,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22e63547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:43:53, skipping insertion in model container [2020-11-06 22:43:53,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:43:53" (3/3) ... [2020-11-06 22:43:53,342 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-11-06 22:43:53,361 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:43:53,366 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:43:53,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:43:53,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:43:53,413 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:43:53,413 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:43:53,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:43:53,413 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:43:53,413 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:43:53,413 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:43:53,414 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:43:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-11-06 22:43:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:43:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:53,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-06 22:43:53,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1268109113, now seen corresponding path program 1 times [2020-11-06 22:43:53,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:53,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949480817] [2020-11-06 22:43:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:43:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-06 22:43:53,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949480817] [2020-11-06 22:43:53,755 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-11-06 22:43:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676577346] [2020-11-06 22:43:53,755 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 [2020-11-06 22:43:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-06 22:43:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:43:53,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:53,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-06 22:43:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823675970] [2020-11-06 22:43:53,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-06 22:43:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:53,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-06 22:43:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:43:53,984 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-11-06 22:43:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:54,011 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-11-06 22:43:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-06 22:43:54,013 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2020-11-06 22:43:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:54,022 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:43:54,022 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:43:54,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:43:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:43:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-06 22:43:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:43:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-11-06 22:43:54,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 39 [2020-11-06 22:43:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:54,072 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-11-06 22:43:54,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-06 22:43:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-11-06 22:43:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:43:54,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:54,076 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-06 22:43:54,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 22:43:54,290 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 922058561, now seen corresponding path program 1 times [2020-11-06 22:43:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:54,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391758282] [2020-11-06 22:43:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:54,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:54,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074775006] [2020-11-06 22:43:54,316 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 [2020-11-06 22:43:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-06 22:43:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:43:54,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391758282] [2020-11-06 22:43:54,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:54,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074775006] [2020-11-06 22:43:54,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:54,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:43:54,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945617840] [2020-11-06 22:43:54,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:43:54,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:43:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:54,512 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2020-11-06 22:43:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:54,535 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-11-06 22:43:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:43:54,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-06 22:43:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:54,538 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:43:54,538 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:43:54,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:43:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-06 22:43:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:43:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-06 22:43:54,548 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-11-06 22:43:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:54,548 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-06 22:43:54,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:43:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-06 22:43:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:43:54,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:54,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-11-06 22:43:54,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:54,765 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1392761921, now seen corresponding path program 1 times [2020-11-06 22:43:54,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:54,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170976966] [2020-11-06 22:43:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:54,788 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:54,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402448704] [2020-11-06 22:43:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-06 22:43:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:43:54,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170976966] [2020-11-06 22:43:54,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:54,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402448704] [2020-11-06 22:43:54,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:54,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:43:54,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748085681] [2020-11-06 22:43:54,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:43:54,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:54,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:43:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:54,972 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-11-06 22:43:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:55,019 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-11-06 22:43:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:43:55,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-11-06 22:43:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:55,021 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:43:55,021 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:43:55,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:43:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-11-06 22:43:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-06 22:43:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-11-06 22:43:55,030 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 41 [2020-11-06 22:43:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:55,030 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-11-06 22:43:55,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:43:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-11-06 22:43:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 22:43:55,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:55,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:55,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:55,248 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:55,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:55,249 INFO L82 PathProgramCache]: Analyzing trace with hash -112490269, now seen corresponding path program 1 times [2020-11-06 22:43:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:55,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251346760] [2020-11-06 22:43:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:55,269 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:55,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636365267] [2020-11-06 22:43:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-06 22:43:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-06 22:43:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-06 22:43:55,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251346760] [2020-11-06 22:43:55,416 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:55,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636365267] [2020-11-06 22:43:55,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:55,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:43:55,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663803445] [2020-11-06 22:43:55,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:43:55,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:43:55,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:55,419 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 3 states. [2020-11-06 22:43:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:55,437 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-11-06 22:43:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:43:55,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-11-06 22:43:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:55,439 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:43:55,439 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:43:55,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:43:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-06 22:43:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:43:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-11-06 22:43:55,447 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 50 [2020-11-06 22:43:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:55,449 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-11-06 22:43:55,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:43:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-11-06 22:43:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 22:43:55,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:55,451 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:55,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:55,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:55,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1558860037, now seen corresponding path program 1 times [2020-11-06 22:43:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:55,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392098392] [2020-11-06 22:43:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:55,687 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:55,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39268059] [2020-11-06 22:43:55,688 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 [2020-11-06 22:43:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:43:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-06 22:43:55,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392098392] [2020-11-06 22:43:55,843 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:55,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39268059] [2020-11-06 22:43:55,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:43:55,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:43:55,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302570330] [2020-11-06 22:43:55,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:43:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:43:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:55,846 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-11-06 22:43:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:56,403 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-11-06 22:43:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:43:56,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-11-06 22:43:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:56,406 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:43:56,407 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:43:56,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:43:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:43:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-11-06 22:43:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:43:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-11-06 22:43:56,416 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 52 [2020-11-06 22:43:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:56,417 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-11-06 22:43:56,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:43:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-11-06 22:43:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-06 22:43:56,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:56,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:56,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:56,620 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash -746489758, now seen corresponding path program 1 times [2020-11-06 22:43:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:56,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009043417] [2020-11-06 22:43:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:43:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-06 22:43:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:43:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:43:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:43:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009043417] [2020-11-06 22:43:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755591326] [2020-11-06 22:43:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:56,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:43:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-06 22:43:57,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:43:57,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 8 [2020-11-06 22:43:57,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149605016] [2020-11-06 22:43:57,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:43:57,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:43:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:43:57,003 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-11-06 22:43:57,183 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-06 22:43:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:57,718 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2020-11-06 22:43:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:43:57,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-11-06 22:43:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:57,720 INFO L225 Difference]: With dead ends: 80 [2020-11-06 22:43:57,720 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:43:57,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:43:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:43:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-11-06 22:43:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:43:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-06 22:43:57,743 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 52 [2020-11-06 22:43:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:57,744 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-06 22:43:57,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:43:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-06 22:43:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 22:43:57,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:57,748 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:43:57,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:57,965 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:57,966 INFO L82 PathProgramCache]: Analyzing trace with hash 622328922, now seen corresponding path program 2 times [2020-11-06 22:43:57,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:57,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474378629] [2020-11-06 22:43:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:43:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:43:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-06 22:43:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:43:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-06 22:43:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-11-06 22:43:58,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474378629] [2020-11-06 22:43:58,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480361505] [2020-11-06 22:43:58,161 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 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 [2020-11-06 22:43:58,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:43:58,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:43:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:43:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-11-06 22:43:58,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:43:58,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-06 22:43:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33391795] [2020-11-06 22:43:58,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:43:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:43:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:43:58,323 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 9 states. [2020-11-06 22:43:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:58,721 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-11-06 22:43:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:43:58,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-11-06 22:43:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:58,723 INFO L225 Difference]: With dead ends: 87 [2020-11-06 22:43:58,723 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:43:58,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:43:58,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:43:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-11-06 22:43:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:43:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-11-06 22:43:58,744 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 63 [2020-11-06 22:43:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:58,744 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-11-06 22:43:58,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:43:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-11-06 22:43:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-06 22:43:58,749 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:58,749 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:58,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:58,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1145979773, now seen corresponding path program 1 times [2020-11-06 22:43:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:58,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867939125] [2020-11-06 22:43:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:58,983 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:58,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084387363] [2020-11-06 22:43:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:43:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:43:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-11-06 22:43:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867939125] [2020-11-06 22:43:59,162 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084387363] [2020-11-06 22:43:59,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:59,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-06 22:43:59,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010346322] [2020-11-06 22:43:59,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:43:59,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:59,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:43:59,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:43:59,165 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-11-06 22:43:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:59,199 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-11-06 22:43:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:43:59,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-11-06 22:43:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:59,200 INFO L225 Difference]: With dead ends: 82 [2020-11-06 22:43:59,201 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:43:59,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:43:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:43:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-11-06 22:43:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-06 22:43:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-11-06 22:43:59,232 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 74 [2020-11-06 22:43:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:59,233 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-11-06 22:43:59,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:43:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-11-06 22:43:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-06 22:43:59,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:59,234 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:59,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-06 22:43:59,436 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1893312699, now seen corresponding path program 2 times [2020-11-06 22:43:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:59,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644154721] [2020-11-06 22:43:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:59,467 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:59,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972230018] [2020-11-06 22:43:59,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:59,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:43:59,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:43:59,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:43:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:43:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-11-06 22:43:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644154721] [2020-11-06 22:43:59,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:43:59,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972230018] [2020-11-06 22:43:59,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:43:59,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:43:59,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555004848] [2020-11-06 22:43:59,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:43:59,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:43:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:43:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:59,631 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 7 states. [2020-11-06 22:43:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:43:59,668 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-11-06 22:43:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:43:59,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-11-06 22:43:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:43:59,671 INFO L225 Difference]: With dead ends: 83 [2020-11-06 22:43:59,671 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:43:59,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:43:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:43:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-06 22:43:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-06 22:43:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-11-06 22:43:59,680 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 76 [2020-11-06 22:43:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:43:59,680 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-11-06 22:43:59,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:43:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-11-06 22:43:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-06 22:43:59,681 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:43:59,682 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 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] [2020-11-06 22:43:59,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:43:59,895 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:43:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:43:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1474251143, now seen corresponding path program 3 times [2020-11-06 22:43:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:43:59,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134120488] [2020-11-06 22:43:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:43:59,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:43:59,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531831616] [2020-11-06 22:43:59,914 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:00,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:44:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:44:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-11-06 22:44:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134120488] [2020-11-06 22:44:00,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:00,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531831616] [2020-11-06 22:44:00,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:00,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-06 22:44:00,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592600803] [2020-11-06 22:44:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:00,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:00,048 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 4 states. [2020-11-06 22:44:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:00,074 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-11-06 22:44:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:00,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-06 22:44:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:00,076 INFO L225 Difference]: With dead ends: 76 [2020-11-06 22:44:00,076 INFO L226 Difference]: Without dead ends: 54 [2020-11-06 22:44:00,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-06 22:44:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-11-06 22:44:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:44:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-11-06 22:44:00,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 78 [2020-11-06 22:44:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:00,086 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-11-06 22:44:00,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-11-06 22:44:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-06 22:44:00,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:00,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2020-11-06 22:44:00,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:00,302 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash -260956503, now seen corresponding path program 4 times [2020-11-06 22:44:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:00,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074274459] [2020-11-06 22:44:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:00,328 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:00,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561391166] [2020-11-06 22:44:00,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:00,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:44:00,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:44:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-11-06 22:44:00,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074274459] [2020-11-06 22:44:00,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:00,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561391166] [2020-11-06 22:44:00,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:00,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-06 22:44:00,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481997088] [2020-11-06 22:44:00,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:00,464 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2020-11-06 22:44:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:00,498 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-11-06 22:44:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:44:00,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-11-06 22:44:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:00,500 INFO L225 Difference]: With dead ends: 86 [2020-11-06 22:44:00,500 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:44:00,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:44:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-06 22:44:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:44:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-11-06 22:44:00,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 80 [2020-11-06 22:44:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:00,510 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-11-06 22:44:00,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-11-06 22:44:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-06 22:44:00,531 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:00,531 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 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, 1, 1, 1, 1, 1] [2020-11-06 22:44:00,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 22:44:00,732 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash -39230031, now seen corresponding path program 5 times [2020-11-06 22:44:00,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:00,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763249379] [2020-11-06 22:44:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:00,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:00,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720405228] [2020-11-06 22:44:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:00,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:44:00,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-06 22:44:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763249379] [2020-11-06 22:44:00,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720405228] [2020-11-06 22:44:00,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-06 22:44:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157265268] [2020-11-06 22:44:00,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:00,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:00,889 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 5 states. [2020-11-06 22:44:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:00,920 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-06 22:44:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:44:00,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-11-06 22:44:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:00,922 INFO L225 Difference]: With dead ends: 92 [2020-11-06 22:44:00,922 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:44:00,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:44:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-06 22:44:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:44:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-11-06 22:44:00,946 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 89 [2020-11-06 22:44:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:00,947 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-11-06 22:44:00,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-11-06 22:44:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-06 22:44:00,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:00,948 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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, 1, 1, 1, 1, 1] [2020-11-06 22:44:01,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:01,151 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 435536239, now seen corresponding path program 6 times [2020-11-06 22:44:01,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:01,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321030053] [2020-11-06 22:44:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:01,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:01,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195360862] [2020-11-06 22:44:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:02,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:44:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:02,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:44:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-06 22:44:02,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321030053] [2020-11-06 22:44:02,365 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:02,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195360862] [2020-11-06 22:44:02,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:02,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-06 22:44:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307639020] [2020-11-06 22:44:02,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:02,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:02,369 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 5 states. [2020-11-06 22:44:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:02,397 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-11-06 22:44:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:44:02,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-11-06 22:44:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:02,399 INFO L225 Difference]: With dead ends: 90 [2020-11-06 22:44:02,399 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:44:02,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:44:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-11-06 22:44:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-06 22:44:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-11-06 22:44:02,411 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 98 [2020-11-06 22:44:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:02,411 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-11-06 22:44:02,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-11-06 22:44:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-06 22:44:02,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:02,413 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-11-06 22:44:02,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:44:02,620 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash -188841071, now seen corresponding path program 7 times [2020-11-06 22:44:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:02,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530792631] [2020-11-06 22:44:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:02,653 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799910186] [2020-11-06 22:44:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:02,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:44:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-11-06 22:44:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530792631] [2020-11-06 22:44:02,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:02,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799910186] [2020-11-06 22:44:02,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:02,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-06 22:44:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321292653] [2020-11-06 22:44:02,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:44:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:44:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:02,837 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 6 states. [2020-11-06 22:44:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:02,869 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-11-06 22:44:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:44:02,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-11-06 22:44:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:02,871 INFO L225 Difference]: With dead ends: 91 [2020-11-06 22:44:02,871 INFO L226 Difference]: Without dead ends: 63 [2020-11-06 22:44:02,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-06 22:44:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-06 22:44:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-06 22:44:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-11-06 22:44:02,889 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 100 [2020-11-06 22:44:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:02,894 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-11-06 22:44:02,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:44:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-11-06 22:44:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:44:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:02,896 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2020-11-06 22:44:03,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:03,110 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:03,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1079985459, now seen corresponding path program 8 times [2020-11-06 22:44:03,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:03,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265359827] [2020-11-06 22:44:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:03,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:03,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77464079] [2020-11-06 22:44:03,141 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:03,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-06 22:44:03,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:03,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:03,680 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:03,681 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:03,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-06 22:44:03,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:03 BoogieIcfgContainer [2020-11-06 22:44:03,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:03,989 INFO L168 Benchmark]: Toolchain (without parser) took 11689.33 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 132.6 MB in the beginning and 170.1 MB in the end (delta: -37.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:03,989 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 122.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:03,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.09 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 122.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:03,995 INFO L168 Benchmark]: Boogie Preprocessor took 107.37 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 132.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:03,996 INFO L168 Benchmark]: RCFGBuilder took 542.00 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 114.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:03,997 INFO L168 Benchmark]: TraceAbstraction took 10653.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 114.3 MB in the beginning and 170.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:03,999 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 122.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 371.09 ms. Allocated memory is still 151.0 MB. Free memory was 131.9 MB in the beginning and 122.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 107.37 ms. Allocated memory is still 151.0 MB. Free memory was 122.4 MB in the beginning and 132.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 542.00 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 114.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10653.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 114.3 MB in the beginning and 170.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L42] int x[5]; VAL [x={2:0}] [L43] CALL init_nondet(x) VAL [x={2:0}] [L16] int i; [L17] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L43] RET init_nondet(x) VAL [x={2:0}] [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; VAL [x={2:0}] [L49] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967289, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483644, cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L49] RET, EXPR rangesum(x) VAL [rangesum(x)=2147483644, x={2:0}] [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp VAL [ret=2147483644, temp=2147483642, x={2:0}] [L52] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967289, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483644, cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L52] RET, EXPR rangesum(x) VAL [rangesum(x)=2147483644, ret=2147483644, temp=2147483642, x={2:0}] [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND FALSE !(i<5 -1) VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L57] x[5 -1] = temp VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L58] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483647, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967293, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483646, cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L58] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=2147483646, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=2147483644, ret2=2147483644, ret5=2147483646, temp=2147483646, x={2:0}] [L61] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum05.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 15, TraceHistogramMax: 15, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 126 SDslu, 797 SDs, 0 SdLazy, 306 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 972 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=14, 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, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 1187 NumberOfCodeBlocks, 1041 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1030 ConstructedInterpolants, 0 QuantifiedInterpolants, 85382 SizeOfPredicates, 12 NumberOfNonLiveVariables, 2899 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 2044/2124 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...