/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:17:01,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:17:01,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:17:01,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:17:01,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:17:01,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:17:01,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:17:01,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:17:01,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:17:01,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:17:01,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:17:01,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:17:01,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:17:01,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:17:01,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:17:01,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:17:01,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:17:01,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:17:01,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:17:01,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:17:01,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:17:01,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:17:01,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:17:01,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:17:01,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:17:01,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:17:01,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:17:01,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:17:01,246 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 [2019-11-23 20:17:01,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:17:01,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:17:01,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:17:01,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:17:01,265 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:17:01,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:17:01,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:17:01,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:17:01,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:17:01,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:17:01,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:17:01,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:17:01,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:17:01,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:17:01,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:17:01,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:17:01,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:17:01,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:17:01,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:17:01,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:17:01,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:17:01,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:17:01,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:17:01,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:17:01,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:17:01,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:17:01,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:17:01,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:17:01,575 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:17:01,575 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:17:01,576 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-23 20:17:01,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe2e3e9a/dbbdccbfa09a4a519c77203017ecfc29/FLAGc84fc8629 [2019-11-23 20:17:02,123 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:17:02,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-23 20:17:02,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe2e3e9a/dbbdccbfa09a4a519c77203017ecfc29/FLAGc84fc8629 [2019-11-23 20:17:02,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fe2e3e9a/dbbdccbfa09a4a519c77203017ecfc29 [2019-11-23 20:17:02,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:17:02,571 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:17:02,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:17:02,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:17:02,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:17:02,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bb72c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02, skipping insertion in model container [2019-11-23 20:17:02,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:17:02,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:17:02,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:17:02,830 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:17:02,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:17:02,873 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:17:02,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02 WrapperNode [2019-11-23 20:17:02,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:17:02,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:17:02,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:17:02,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:17:02,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:17:03,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:17:03,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:17:03,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:17:03,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:03,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:17:03,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:17:03,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:17:03,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:17:03,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (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 [2019-11-23 20:17:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:17:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:17:03,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:17:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:17:03,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:17:03,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:17:03,473 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:17:03,474 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 20:17:03,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:17:03 BoogieIcfgContainer [2019-11-23 20:17:03,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:17:03,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:17:03,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:17:03,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:17:03,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:17:02" (1/3) ... [2019-11-23 20:17:03,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b2cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:17:03, skipping insertion in model container [2019-11-23 20:17:03,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (2/3) ... [2019-11-23 20:17:03,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b2cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:17:03, skipping insertion in model container [2019-11-23 20:17:03,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:17:03" (3/3) ... [2019-11-23 20:17:03,483 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-11-23 20:17:03,495 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:17:03,502 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:17:03,513 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:17:03,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:17:03,538 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:17:03,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:17:03,539 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:17:03,539 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:17:03,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:17:03,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:17:03,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:17:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-23 20:17:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:17:03,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,566 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, 1, 1, 1, 1, 1] [2019-11-23 20:17:03,567 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2019-11-23 20:17:03,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613225270] [2019-11-23 20:17:03,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:03,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613225270] [2019-11-23 20:17:03,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:03,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:17:03,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500801017] [2019-11-23 20:17:03,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:17:03,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:17:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:17:03,730 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-23 20:17:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:03,755 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2019-11-23 20:17:03,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:17:03,757 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-11-23 20:17:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:03,767 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:17:03,768 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:17:03,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:17:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:17:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 20:17:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:17:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:17:03,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2019-11-23 20:17:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:03,818 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:17:03,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:17:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:17:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:17:03,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,822 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, 1, 1, 1, 1, 1] [2019-11-23 20:17:03,823 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,824 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2019-11-23 20:17:03,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721849540] [2019-11-23 20:17:03,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:04,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721849540] [2019-11-23 20:17:04,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:04,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:17:04,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181222176] [2019-11-23 20:17:04,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:17:04,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:17:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:04,015 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 4 states. [2019-11-23 20:17:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,107 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-23 20:17:04,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:17:04,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:17:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,109 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:17:04,110 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:17:04,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:17:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:17:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:17:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:17:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2019-11-23 20:17:04,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2019-11-23 20:17:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,132 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2019-11-23 20:17:04,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:17:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2019-11-23 20:17:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:17:04,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,136 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:04,137 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:04,138 INFO L82 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2019-11-23 20:17:04,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:04,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878349127] [2019-11-23 20:17:04,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:17:04,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878349127] [2019-11-23 20:17:04,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:04,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:17:04,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236236336] [2019-11-23 20:17:04,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:17:04,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:17:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:17:04,213 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 3 states. [2019-11-23 20:17:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,282 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2019-11-23 20:17:04,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:17:04,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-23 20:17:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,285 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:17:04,285 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:17:04,286 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 [2019-11-23 20:17:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:17:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 20:17:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:17:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2019-11-23 20:17:04,295 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 29 [2019-11-23 20:17:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,296 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2019-11-23 20:17:04,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:17:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2019-11-23 20:17:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:17:04,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:04,298 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1139067424, now seen corresponding path program 1 times [2019-11-23 20:17:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:04,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012586874] [2019-11-23 20:17:04,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:17:04,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012586874] [2019-11-23 20:17:04,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:04,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:17:04,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309306012] [2019-11-23 20:17:04,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:17:04,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:17:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:04,369 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand 4 states. [2019-11-23 20:17:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,561 INFO L93 Difference]: Finished difference Result 108 states and 144 transitions. [2019-11-23 20:17:04,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:17:04,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-23 20:17:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,562 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:17:04,562 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:17:04,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:17:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-23 20:17:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:17:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-23 20:17:04,579 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 31 [2019-11-23 20:17:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,579 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-23 20:17:04,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:17:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-23 20:17:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:17:04,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,583 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, 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] [2019-11-23 20:17:04,583 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:04,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:04,584 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2019-11-23 20:17:04,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:04,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134206518] [2019-11-23 20:17:04,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:17:04,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134206518] [2019-11-23 20:17:04,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284717218] [2019-11-23 20:17:04,719 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 [2019-11-23 20:17:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:17:04,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:17:04,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:04,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:17:04,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957259082] [2019-11-23 20:17:04,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:17:04,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:17:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:17:04,866 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2019-11-23 20:17:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,955 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2019-11-23 20:17:04,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:17:04,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:17:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,956 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:17:04,956 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:17:04,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:17:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:17:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-23 20:17:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:17:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 20:17:04,964 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2019-11-23 20:17:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,965 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 20:17:04,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:17:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 20:17:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:17:04,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,968 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:05,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:05,169 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2019-11-23 20:17:05,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:05,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918770338] [2019-11-23 20:17:05,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:17:05,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918770338] [2019-11-23 20:17:05,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454759007] [2019-11-23 20:17:05,251 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 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 [2019-11-23 20:17:05,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:17:05,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:05,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:17:05,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:17:05,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:05,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:17:05,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060703341] [2019-11-23 20:17:05,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:17:05,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:17:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:17:05,342 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2019-11-23 20:17:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:05,729 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-11-23 20:17:05,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:17:05,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:17:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:05,731 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:17:05,731 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:17:05,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:17:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:17:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2019-11-23 20:17:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:17:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2019-11-23 20:17:05,750 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2019-11-23 20:17:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:05,751 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2019-11-23 20:17:05,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:17:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2019-11-23 20:17:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:17:05,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:05,753 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:05,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:05,957 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2019-11-23 20:17:05,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:05,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500493148] [2019-11-23 20:17:05,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:08,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500493148] [2019-11-23 20:17:08,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784509380] [2019-11-23 20:17:08,895 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 [2019-11-23 20:17:08,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:17:08,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:08,968 WARN L253 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 105 conjunts are in the unsatisfiable core [2019-11-23 20:17:08,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:09,140 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:17:09,141 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:09,153 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:09,154 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:09,155 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2019-11-23 20:17:18,912 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:18,913 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:17:18,914 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:17:18,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:18,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:18,947 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:17:18,947 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-23 20:17:19,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:19,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:19,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:19,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:19,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 57] total 92 [2019-11-23 20:17:19,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786926668] [2019-11-23 20:17:19,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-11-23 20:17:19,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:19,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-11-23 20:17:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 20:17:19,428 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 92 states.