/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-crafted/xor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:17:49,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:17:49,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:17:49,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:17:49,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:17:49,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:17:49,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:17:49,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:17:49,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:17:49,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:17:49,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:17:49,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:17:49,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:17:49,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:17:49,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:17:49,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:17:49,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:17:49,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:17:49,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:17:49,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:17:49,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:17:49,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:17:49,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:17:49,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:17:49,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:17:49,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:17:49,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:17:49,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:17:49,528 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 [2019-11-07 01:17:49,548 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:17:49,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:17:49,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:17:49,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:17:49,550 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:17:49,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:17:49,551 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:17:49,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:17:49,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:17:49,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:17:49,552 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:17:49,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:17:49,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:17:49,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:17:49,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:17:49,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:17:49,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:17:49,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:17:49,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:17:49,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:17:49,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:17:49,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:17:49,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:17:49,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:17:49,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:17:49,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:17:49,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:17:49,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:17:49,875 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:17:49,876 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor3.i [2019-11-07 01:17:49,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11a1ec881/02e695975c814b3cbfa5f4cd53706dbd/FLAGb453a9979 [2019-11-07 01:17:50,434 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:17:50,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor3.i [2019-11-07 01:17:50,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11a1ec881/02e695975c814b3cbfa5f4cd53706dbd/FLAGb453a9979 [2019-11-07 01:17:50,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11a1ec881/02e695975c814b3cbfa5f4cd53706dbd [2019-11-07 01:17:50,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:17:50,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:17:50,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:50,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:17:50,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:17:50,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:50" (1/1) ... [2019-11-07 01:17:50,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:50, skipping insertion in model container [2019-11-07 01:17:50,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:17:50" (1/1) ... [2019-11-07 01:17:50,847 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:17:50,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:17:51,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:51,147 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:17:51,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:17:51,322 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:17:51,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51 WrapperNode [2019-11-07 01:17:51,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:17:51,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:17:51,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:17:51,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:17:51,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (1/1) ... [2019-11-07 01:17:51,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:17:51,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:17:51,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:17:51,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:17:51,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (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 [2019-11-07 01:17:51,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:17:51,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:17:51,421 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-11-07 01:17:51,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:17:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:17:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:17:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:17:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:17:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:17:51,808 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:17:51,808 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:17:51,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:51 BoogieIcfgContainer [2019-11-07 01:17:51,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:17:51,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:17:51,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:17:51,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:17:51,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:17:50" (1/3) ... [2019-11-07 01:17:51,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6641e548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:51, skipping insertion in model container [2019-11-07 01:17:51,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:17:51" (2/3) ... [2019-11-07 01:17:51,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6641e548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:17:51, skipping insertion in model container [2019-11-07 01:17:51,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:17:51" (3/3) ... [2019-11-07 01:17:51,818 INFO L109 eAbstractionObserver]: Analyzing ICFG xor3.i [2019-11-07 01:17:51,828 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:17:51,837 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:17:51,849 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:17:51,873 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:17:51,873 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:17:51,873 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:17:51,873 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:17:51,874 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:17:51,874 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:17:51,874 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:17:51,874 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:17:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:17:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:17:51,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:51,895 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:51,896 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash -809725829, now seen corresponding path program 1 times [2019-11-07 01:17:51,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:51,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287054820] [2019-11-07 01:17:51,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:17:52,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287054820] [2019-11-07 01:17:52,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:52,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:52,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8389789] [2019-11-07 01:17:52,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,113 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:17:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,149 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 01:17:52,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 01:17:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,161 INFO L225 Difference]: With dead ends: 41 [2019-11-07 01:17:52,161 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:17:52,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:17:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:17:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:17:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 01:17:52,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 01:17:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,205 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 01:17:52,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 01:17:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:17:52,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,208 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:52,208 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash 994996090, now seen corresponding path program 1 times [2019-11-07 01:17:52,209 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,209 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567449975] [2019-11-07 01:17:52,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567449975] [2019-11-07 01:17:52,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255727728] [2019-11-07 01:17:52,293 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 [2019-11-07 01:17:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:17:52,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,402 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:17:52,455 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:17:52,455 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:17:52,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315646283] [2019-11-07 01:17:52,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,457 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:52,460 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 01:17:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,476 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 01:17:52,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 01:17:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,478 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:17:52,479 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:17:52,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:17:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:17:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 01:17:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:17:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 01:17:52,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 01:17:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,492 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 01:17:52,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 01:17:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:17:52,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,497 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] [2019-11-07 01:17:52,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:52,704 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -421018474, now seen corresponding path program 1 times [2019-11-07 01:17:52,705 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,706 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105263589] [2019-11-07 01:17:52,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:52,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105263589] [2019-11-07 01:17:52,841 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:17:52,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:17:52,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816092007] [2019-11-07 01:17:52,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:17:52,843 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:17:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,844 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 01:17:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:52,864 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 01:17:52,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:17:52,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 01:17:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:52,867 INFO L225 Difference]: With dead ends: 31 [2019-11-07 01:17:52,868 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:17:52,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:17:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:17:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:17:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:17:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:17:52,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 01:17:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:52,892 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:17:52,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:17:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:17:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:17:52,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:52,894 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] [2019-11-07 01:17:52,894 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash -661634715, now seen corresponding path program 1 times [2019-11-07 01:17:52,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:52,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311197810] [2019-11-07 01:17:52,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:52,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311197810] [2019-11-07 01:17:52,994 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489244636] [2019-11-07 01:17:52,995 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 [2019-11-07 01:17:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:53,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:53,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:53,093 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:53,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103348220] [2019-11-07 01:17:53,209 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:53,209 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:53,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:53,230 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:53,381 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:53,909 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:17:53,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:53,942 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:54,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:54,576 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 01:17:54,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756565464] [2019-11-07 01:17:54,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:17:54,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:17:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:17:54,582 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 01:17:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:17:55,539 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 01:17:55,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:17:55,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 01:17:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:17:55,543 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:17:55,543 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 01:17:55,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 01:17:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 01:17:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 01:17:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:17:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 01:17:55,552 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 01:17:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:17:55,552 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 01:17:55,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:17:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 01:17:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:17:55,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:17:55,554 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:17:55,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:17:55,762 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:17:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:17:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash -139894362, now seen corresponding path program 2 times [2019-11-07 01:17:55,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:17:55,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605992398] [2019-11-07 01:17:55,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:17:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:17:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:17:55,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605992398] [2019-11-07 01:17:55,903 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86389776] [2019-11-07 01:17:55,904 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 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 [2019-11-07 01:17:55,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:17:55,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:17:55,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:17:55,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:17:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:55,984 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:17:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:17:56,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99317371] [2019-11-07 01:17:56,022 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:17:56,022 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:17:56,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:17:56,023 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:17:56,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:17:56,058 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:17:56,368 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:17:56,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:17:56,414 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:17:59,181 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:17:59,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 01:17:59,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118378780] [2019-11-07 01:17:59,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:17:59,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:17:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:17:59,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=524, Unknown=1, NotChecked=0, Total=600 [2019-11-07 01:17:59,185 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 01:18:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:06,431 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 01:18:06,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:18:06,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 01:18:06,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:06,433 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:18:06,433 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:18:06,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=247, Invalid=1730, Unknown=3, NotChecked=0, Total=1980 [2019-11-07 01:18:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:18:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 01:18:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:18:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 01:18:06,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 01:18:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:06,443 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 01:18:06,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:18:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 01:18:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:18:06,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:06,445 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:06,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:06,646 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1028595953, now seen corresponding path program 3 times [2019-11-07 01:18:06,647 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:06,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745621485] [2019-11-07 01:18:06,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745621485] [2019-11-07 01:18:06,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546446174] [2019-11-07 01:18:06,769 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 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 [2019-11-07 01:18:06,846 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:18:06,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:06,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:18:06,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:06,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141126357] [2019-11-07 01:18:06,982 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:06,982 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:06,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:06,983 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:06,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:07,007 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:07,317 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:07,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:07,336 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:08,171 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:08,171 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 01:18:08,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535296013] [2019-11-07 01:18:08,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:18:08,173 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:18:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:18:08,176 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 01:18:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:09,426 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 01:18:09,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:18:09,427 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 01:18:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:09,428 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:18:09,428 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:18:09,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 01:18:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:18:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 01:18:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:18:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 01:18:09,438 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 01:18:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:09,438 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 01:18:09,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:18:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 01:18:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 01:18:09,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:09,440 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:09,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:09,649 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -500498258, now seen corresponding path program 4 times [2019-11-07 01:18:09,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:09,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920353104] [2019-11-07 01:18:09,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:09,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920353104] [2019-11-07 01:18:09,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804668731] [2019-11-07 01:18:09,894 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-07 01:18:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:09,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:18:09,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:09,997 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:10,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440183573] [2019-11-07 01:18:10,268 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:10,268 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:10,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:10,269 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:10,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:10,298 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:10,517 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:10,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:10,531 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:11,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:11,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 01:18:11,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533052] [2019-11-07 01:18:11,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 01:18:11,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 01:18:11,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:18:11,164 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 01:18:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:12,941 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 01:18:12,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 01:18:12,942 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 01:18:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:12,944 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:18:12,944 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:18:12,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1281, Invalid=5039, Unknown=0, NotChecked=0, Total=6320 [2019-11-07 01:18:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:18:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 01:18:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:18:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 01:18:12,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 01:18:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:12,956 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 01:18:12,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 01:18:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 01:18:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 01:18:12,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:12,958 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:13,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:13,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1795685774, now seen corresponding path program 5 times [2019-11-07 01:18:13,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:13,163 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41263868] [2019-11-07 01:18:13,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:18:13,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41263868] [2019-11-07 01:18:13,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51195125] [2019-11-07 01:18:13,629 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 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 [2019-11-07 01:18:13,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:18:13,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:13,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:18:13,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 01:18:13,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 01:18:13,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687578212] [2019-11-07 01:18:13,839 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:13,839 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:13,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:13,840 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:13,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:13,870 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:14,119 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:14,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:14,138 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:15,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:15,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 01:18:15,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402067596] [2019-11-07 01:18:15,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:18:15,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:18:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1702, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 01:18:15,172 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 01:18:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:21,691 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 01:18:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 01:18:21,691 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 01:18:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:21,693 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:18:21,693 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 01:18:21,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1386, Invalid=6446, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 01:18:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 01:18:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 01:18:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:18:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 01:18:21,722 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 01:18:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:21,723 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 01:18:21,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:18:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 01:18:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 01:18:21,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:21,724 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:21,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:21,927 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash -344788902, now seen corresponding path program 6 times [2019-11-07 01:18:21,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:21,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912967468] [2019-11-07 01:18:21,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:22,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912967468] [2019-11-07 01:18:22,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3236546] [2019-11-07 01:18:22,450 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 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 [2019-11-07 01:18:22,574 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:18:22,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:18:22,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:18:22,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:22,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:18:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:23,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775484487] [2019-11-07 01:18:23,587 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:18:23,587 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:18:23,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:18:23,588 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:18:23,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:18:23,609 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:18:23,851 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 1 for LOIs [2019-11-07 01:18:23,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:18:23,871 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:18:26,673 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:18:26,673 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 73 [2019-11-07 01:18:26,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663747064] [2019-11-07 01:18:26,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-07 01:18:26,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:18:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-07 01:18:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=3504, Unknown=1, NotChecked=0, Total=5256 [2019-11-07 01:18:26,678 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 73 states. [2019-11-07 01:18:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:18:30,471 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-11-07 01:18:30,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-07 01:18:30,472 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 67 [2019-11-07 01:18:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:18:30,474 INFO L225 Difference]: With dead ends: 104 [2019-11-07 01:18:30,474 INFO L226 Difference]: Without dead ends: 83 [2019-11-07 01:18:30,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5136, Invalid=14323, Unknown=1, NotChecked=0, Total=19460 [2019-11-07 01:18:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-07 01:18:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-07 01:18:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:18:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-07 01:18:30,488 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-11-07 01:18:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:18:30,489 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-07 01:18:30,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-07 01:18:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-07 01:18:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 01:18:30,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:18:30,491 INFO L410 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:18:30,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:18:30,694 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:18:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:18:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash -303923653, now seen corresponding path program 7 times [2019-11-07 01:18:30,695 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:18:30,695 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427889355] [2019-11-07 01:18:30,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:18:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:32,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427889355] [2019-11-07 01:18:32,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130502427] [2019-11-07 01:18:32,290 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-07 01:18:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:18:32,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:18:32,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:18:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:18:32,488 INFO L321 TraceCheckSpWp]: Computing backward predicates...