/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-multidimensional/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:49:53,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:49:53,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:49:53,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:49:53,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:49:53,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:49:53,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:49:53,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:49:53,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:49:53,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:49:53,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:49:53,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:49:53,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:49:53,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:49:53,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:49:53,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:49:53,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:49:53,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:49:53,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:49:53,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:49:53,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:49:53,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:49:53,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:49:53,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:49:53,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:49:53,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:49:53,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:49:53,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:49:53,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:49:53,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:49:53,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:49:53,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:49:53,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:49:53,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:49:53,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:49:53,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:49:53,850 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 [2019-11-06 18:49:53,872 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:49:53,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:49:53,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:49:53,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:49:53,875 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:49:53,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:49:53,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:49:53,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:49:53,877 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:49:53,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:49:53,877 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:49:53,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:49:53,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:49:53,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:49:53,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:49:53,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:49:53,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:49:53,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:49:53,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:49:53,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:49:53,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:49:53,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:49:53,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:49:53,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:49:54,138 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:49:54,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:49:54,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:49:54,156 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:49:54,157 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:49:54,157 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-06 18:49:54,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4d06e57/719df0b3fb6448259d620570b2d8a376/FLAGc8f433a0e [2019-11-06 18:49:54,647 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:49:54,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-11-06 18:49:54,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4d06e57/719df0b3fb6448259d620570b2d8a376/FLAGc8f433a0e [2019-11-06 18:49:55,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f4d06e57/719df0b3fb6448259d620570b2d8a376 [2019-11-06 18:49:55,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:49:55,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:49:55,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:55,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:49:55,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:49:55,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a30b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55, skipping insertion in model container [2019-11-06 18:49:55,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,059 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:49:55,080 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:49:55,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:55,244 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:49:55,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:55,387 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:49:55,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55 WrapperNode [2019-11-06 18:49:55,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:55,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:49:55,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:49:55,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:49:55,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (1/1) ... [2019-11-06 18:49:55,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:49:55,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:49:55,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:49:55,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:49:55,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (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 [2019-11-06 18:49:55,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:49:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:49:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:49:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:49:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:49:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:49:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 18:49:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:49:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:49:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:49:55,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:49:55,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:49:55,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:49:55,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:49:55,861 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:49:55,862 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-06 18:49:55,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:55 BoogieIcfgContainer [2019-11-06 18:49:55,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:49:55,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:49:55,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:49:55,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:49:55,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:49:55" (1/3) ... [2019-11-06 18:49:55,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1242d2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:55, skipping insertion in model container [2019-11-06 18:49:55,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:55" (2/3) ... [2019-11-06 18:49:55,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1242d2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:49:55, skipping insertion in model container [2019-11-06 18:49:55,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:49:55" (3/3) ... [2019-11-06 18:49:55,870 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-11-06 18:49:55,880 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:49:55,887 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:49:55,898 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:49:55,925 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:49:55,925 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:49:55,925 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:49:55,926 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:49:55,926 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:49:55,926 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:49:55,926 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:49:55,926 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:49:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-06 18:49:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:49:55,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:55,947 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:55,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 94592989, now seen corresponding path program 1 times [2019-11-06 18:49:55,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:55,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835218681] [2019-11-06 18:49:55,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:56,032 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:56,033 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125301866] [2019-11-06 18:49:56,033 INFO L94 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 [2019-11-06 18:49:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:56,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:56,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:56,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835218681] [2019-11-06 18:49:56,173 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:56,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125301866] [2019-11-06 18:49:56,177 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:56,177 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:49:56,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623532446] [2019-11-06 18:49:56,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:49:56,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:49:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:49:56,200 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-11-06 18:49:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:56,296 INFO L93 Difference]: Finished difference Result 65 states and 102 transitions. [2019-11-06 18:49:56,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:49:56,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 18:49:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:56,307 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:49:56,308 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:49:56,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:49:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:49:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-06 18:49:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:49:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-06 18:49:56,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2019-11-06 18:49:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:56,360 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-06 18:49:56,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:49:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-06 18:49:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:49:56,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:56,362 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:56,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:56,566 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1982042687, now seen corresponding path program 1 times [2019-11-06 18:49:56,568 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:56,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940748891] [2019-11-06 18:49:56,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:56,579 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:56,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359320243] [2019-11-06 18:49:56,580 INFO L94 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 [2019-11-06 18:49:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:56,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:56,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:56,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940748891] [2019-11-06 18:49:56,667 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:56,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359320243] [2019-11-06 18:49:56,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:56,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:56,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930434212] [2019-11-06 18:49:56,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:56,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:56,671 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-11-06 18:49:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:56,776 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-11-06 18:49:56,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:56,778 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:49:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:56,780 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:49:56,782 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:49:56,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:49:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2019-11-06 18:49:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:49:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-06 18:49:56,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2019-11-06 18:49:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:56,815 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-06 18:49:56,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:56,815 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-06 18:49:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:49:56,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:56,820 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:57,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:57,028 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1652526196, now seen corresponding path program 1 times [2019-11-06 18:49:57,030 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:57,030 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952239045] [2019-11-06 18:49:57,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:57,039 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:57,040 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714245532] [2019-11-06 18:49:57,040 INFO L94 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 [2019-11-06 18:49:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:57,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:57,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:57,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952239045] [2019-11-06 18:49:57,131 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:57,132 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714245532] [2019-11-06 18:49:57,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:57,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:49:57,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812180150] [2019-11-06 18:49:57,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:57,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:57,136 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-11-06 18:49:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:57,252 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-06 18:49:57,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:57,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-06 18:49:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:57,254 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:49:57,254 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:49:57,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:49:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-11-06 18:49:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:49:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 18:49:57,264 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 22 [2019-11-06 18:49:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:57,264 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 18:49:57,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 18:49:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:49:57,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:57,266 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:57,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:57,472 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:57,472 INFO L82 PathProgramCache]: Analyzing trace with hash -27449567, now seen corresponding path program 2 times [2019-11-06 18:49:57,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:57,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241223977] [2019-11-06 18:49:57,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:57,496 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:57,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583972959] [2019-11-06 18:49:57,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:49:57,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:49:57,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:57,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:49:57,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:49:57,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241223977] [2019-11-06 18:49:57,555 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:57,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583972959] [2019-11-06 18:49:57,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:49:57,555 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:49:57,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008339774] [2019-11-06 18:49:57,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:49:57,556 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:49:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:57,557 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2019-11-06 18:49:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:57,667 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2019-11-06 18:49:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:49:57,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:49:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:57,669 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:49:57,669 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:49:57,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:49:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:49:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-11-06 18:49:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:49:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-06 18:49:57,691 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2019-11-06 18:49:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:57,694 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-06 18:49:57,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:49:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-06 18:49:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:49:57,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:57,696 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:57,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:57,897 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 24575093, now seen corresponding path program 1 times [2019-11-06 18:49:57,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:57,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757227177] [2019-11-06 18:49:57,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:57,906 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:57,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031936704] [2019-11-06 18:49:57,907 INFO L94 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 [2019-11-06 18:49:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:57,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:49:57,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:49:58,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757227177] [2019-11-06 18:49:58,006 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:58,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031936704] [2019-11-06 18:49:58,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:58,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:49:58,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746321713] [2019-11-06 18:49:58,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:49:58,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:49:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:58,008 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2019-11-06 18:49:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:58,127 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-06 18:49:58,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:49:58,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-06 18:49:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:58,129 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:49:58,129 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:49:58,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:49:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:49:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-06 18:49:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:49:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2019-11-06 18:49:58,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2019-11-06 18:49:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:58,145 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2019-11-06 18:49:58,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:49:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2019-11-06 18:49:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:49:58,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:58,147 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:49:58,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:58,356 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:58,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2136339146, now seen corresponding path program 2 times [2019-11-06 18:49:58,357 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:58,357 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432623907] [2019-11-06 18:49:58,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:58,365 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:58,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40899611] [2019-11-06 18:49:58,365 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:58,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:58,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:58,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:49:58,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:49:58,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432623907] [2019-11-06 18:49:58,472 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:58,472 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40899611] [2019-11-06 18:49:58,472 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:58,472 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:49:58,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636635435] [2019-11-06 18:49:58,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:49:58,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:49:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:58,475 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 7 states. [2019-11-06 18:49:58,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:58,621 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2019-11-06 18:49:58,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:49:58,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-06 18:49:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:58,623 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:49:58,623 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:49:58,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:49:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:49:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-06 18:49:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:49:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-06 18:49:58,643 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 36 [2019-11-06 18:49:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:58,643 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-06 18:49:58,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:49:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-06 18:49:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:49:58,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:58,647 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2019-11-06 18:49:58,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:58,850 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 6847317, now seen corresponding path program 3 times [2019-11-06 18:49:58,851 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:58,851 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093015712] [2019-11-06 18:49:58,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:58,859 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:58,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829107466] [2019-11-06 18:49:58,860 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:58,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:49:58,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:58,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:49:58,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:49:58,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093015712] [2019-11-06 18:49:58,955 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:49:58,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829107466] [2019-11-06 18:49:58,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:49:58,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:49:58,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027165742] [2019-11-06 18:49:58,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:49:58,958 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:49:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:58,969 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 5 states. [2019-11-06 18:49:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:59,068 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2019-11-06 18:49:59,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:49:59,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-11-06 18:49:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:59,070 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:49:59,070 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:49:59,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:49:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:49:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 75. [2019-11-06 18:49:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 18:49:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-11-06 18:49:59,097 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 39 [2019-11-06 18:49:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:59,100 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-11-06 18:49:59,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:49:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-11-06 18:49:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:49:59,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:59,101 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:59,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:59,304 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -763208995, now seen corresponding path program 4 times [2019-11-06 18:49:59,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:59,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260348629] [2019-11-06 18:49:59,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:59,313 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:49:59,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311449656] [2019-11-06 18:49:59,314 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true