/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:43,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:43,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:43,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:43,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:43,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:43,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:43,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:43,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:43,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:43,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:43,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:43,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:43,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:43,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:43,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:43,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:43,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:43,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:43,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:43,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:43,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:43,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:43,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:43,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:43,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:43,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:43,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:43,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:43:43,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:43,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:43,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:43,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:43,425 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:43,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:43,426 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:43,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:43,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:43,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:43,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:43,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:43,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:43,427 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:43,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:43,427 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:43,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:43,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:43,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:43,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:43,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:43,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:43,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:43,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:43,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:43,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:43,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:43,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:43,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:43,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:43,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:43,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:43,953 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:43,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:43,956 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:43,957 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-04 13:43:44,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/300ac5656/f0452126c55d453584d8ee43abd97ffe/FLAG34186be35 [2020-09-04 13:43:44,718 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:44,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-04 13:43:44,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/300ac5656/f0452126c55d453584d8ee43abd97ffe/FLAG34186be35 [2020-09-04 13:43:44,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/300ac5656/f0452126c55d453584d8ee43abd97ffe [2020-09-04 13:43:45,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:45,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:45,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:45,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:45,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:45,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:44" (1/1) ... [2020-09-04 13:43:45,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605628e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45, skipping insertion in model container [2020-09-04 13:43:45,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:44" (1/1) ... [2020-09-04 13:43:45,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:45,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:45,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:45,325 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:45,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:45,467 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:45,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45 WrapperNode [2020-09-04 13:43:45,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:45,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:45,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:45,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:45,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... [2020-09-04 13:43:45,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:45,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:45,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:45,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:45,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:43:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:45,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:45,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:43:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:43:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:43:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:43:46,021 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:46,021 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:43:46,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:46 BoogieIcfgContainer [2020-09-04 13:43:46,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:46,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:46,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:46,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:46,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:44" (1/3) ... [2020-09-04 13:43:46,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20214db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:46, skipping insertion in model container [2020-09-04 13:43:46,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:45" (2/3) ... [2020-09-04 13:43:46,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20214db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:46, skipping insertion in model container [2020-09-04 13:43:46,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:46" (3/3) ... [2020-09-04 13:43:46,045 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-04 13:43:46,064 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:46,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-04 13:43:46,108 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-04 13:43:46,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:46,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:46,148 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:46,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:46,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:46,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:46,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:46,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:46,180 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-04 13:43:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:46,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:46,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:46,191 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1504353719, now seen corresponding path program 1 times [2020-09-04 13:43:46,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:46,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626021658] [2020-09-04 13:43:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:46,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626021658] [2020-09-04 13:43:46,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:46,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:43:46,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062010605] [2020-09-04 13:43:46,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:43:46,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:43:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:46,591 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-09-04 13:43:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:46,794 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-09-04 13:43:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:43:46,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-04 13:43:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:46,811 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:43:46,811 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:43:46,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:43:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-09-04 13:43:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:43:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-09-04 13:43:46,874 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2020-09-04 13:43:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:46,875 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-09-04 13:43:46,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:43:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-09-04 13:43:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:43:46,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:46,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:46,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:43:46,877 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1581018098, now seen corresponding path program 1 times [2020-09-04 13:43:46,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:46,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539486377] [2020-09-04 13:43:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:46,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:46,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539486377] [2020-09-04 13:43:46,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:46,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:43:46,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90924327] [2020-09-04 13:43:46,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:46,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:46,999 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-09-04 13:43:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:47,120 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-09-04 13:43:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:47,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:43:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:47,124 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:43:47,124 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:43:47,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:43:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-09-04 13:43:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:43:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-09-04 13:43:47,137 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2020-09-04 13:43:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:47,137 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-09-04 13:43:47,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-09-04 13:43:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:43:47,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:47,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:47,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:43:47,139 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1644741047, now seen corresponding path program 1 times [2020-09-04 13:43:47,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:47,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837818412] [2020-09-04 13:43:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:47,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:47,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837818412] [2020-09-04 13:43:47,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:47,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:43:47,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128355339] [2020-09-04 13:43:47,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:43:47,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:47,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:43:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:47,291 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 4 states. [2020-09-04 13:43:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:47,440 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-09-04 13:43:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:43:47,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-04 13:43:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:47,455 INFO L225 Difference]: With dead ends: 60 [2020-09-04 13:43:47,456 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 13:43:47,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 13:43:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-09-04 13:43:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:43:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 13:43:47,467 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2020-09-04 13:43:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:47,467 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 13:43:47,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:43:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 13:43:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 13:43:47,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:47,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:47,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:43:47,470 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1824116622, now seen corresponding path program 1 times [2020-09-04 13:43:47,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95202896] [2020-09-04 13:43:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:47,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:47,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95202896] [2020-09-04 13:43:47,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:47,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:43:47,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246645305] [2020-09-04 13:43:47,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:43:47,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:43:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:47,550 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-09-04 13:43:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:47,640 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-04 13:43:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:43:47,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-04 13:43:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:47,642 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:43:47,642 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:43:47,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:43:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-09-04 13:43:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 13:43:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-09-04 13:43:47,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2020-09-04 13:43:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:47,650 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-09-04 13:43:47,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:43:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-09-04 13:43:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:43:47,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:47,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:47,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:43:47,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1385845809, now seen corresponding path program 1 times [2020-09-04 13:43:47,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:47,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075637301] [2020-09-04 13:43:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:48,868 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 88 [2020-09-04 13:43:49,367 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 72 [2020-09-04 13:43:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:49,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075637301] [2020-09-04 13:43:49,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:49,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 13:43:49,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161735278] [2020-09-04 13:43:49,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:43:49,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:43:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:43:49,447 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 10 states. [2020-09-04 13:43:51,876 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2020-09-04 13:43:52,253 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-04 13:43:52,483 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-09-04 13:43:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:52,733 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-09-04 13:43:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:43:52,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-09-04 13:43:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:52,740 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:43:52,740 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 13:43:52,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:43:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 13:43:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2020-09-04 13:43:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 13:43:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-04 13:43:52,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2020-09-04 13:43:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:52,768 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-04 13:43:52,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:43:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-04 13:43:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:43:52,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:52,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:52,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 13:43:52,771 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash -624217503, now seen corresponding path program 1 times [2020-09-04 13:43:52,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:52,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673718868] [2020-09-04 13:43:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:52,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673718868] [2020-09-04 13:43:52,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:52,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:43:52,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751849862] [2020-09-04 13:43:52,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:43:52,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:52,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:43:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:43:52,911 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-04 13:43:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,137 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-09-04 13:43:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:43:53,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-04 13:43:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,140 INFO L225 Difference]: With dead ends: 63 [2020-09-04 13:43:53,140 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:43:53,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:43:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2020-09-04 13:43:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:43:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 13:43:53,165 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2020-09-04 13:43:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,166 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 13:43:53,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:43:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 13:43:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:43:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:53,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 13:43:53,170 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash -640274852, now seen corresponding path program 1 times [2020-09-04 13:43:53,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223149530] [2020-09-04 13:43:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:53,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223149530] [2020-09-04 13:43:53,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:53,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:43:53,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163744289] [2020-09-04 13:43:53,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:43:53,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:43:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:43:53,277 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 7 states. [2020-09-04 13:43:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,476 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-09-04 13:43:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:43:53,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-04 13:43:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,478 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:43:53,478 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 13:43:53,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:43:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 13:43:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2020-09-04 13:43:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:43:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-04 13:43:53,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2020-09-04 13:43:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,489 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-04 13:43:53,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:43:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-04 13:43:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:43:53,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,491 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:53,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 13:43:53,491 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,491 INFO L82 PathProgramCache]: Analyzing trace with hash 358048683, now seen corresponding path program 1 times [2020-09-04 13:43:53,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302354716] [2020-09-04 13:43:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:53,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302354716] [2020-09-04 13:43:53,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453768219] [2020-09-04 13:43:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 13:43:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:54,148 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_37 already exists [2020-09-04 13:43:54,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:54,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 13:43:54,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048634963] [2020-09-04 13:43:54,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:43:54,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:43:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:43:54,151 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-09-04 13:43:54,397 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-09-04 13:43:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:54,513 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-04 13:43:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:43:54,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-04 13:43:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:54,514 INFO L225 Difference]: With dead ends: 50 [2020-09-04 13:43:54,515 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 13:43:54,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 13:43:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-04 13:43:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 13:43:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-04 13:43:54,523 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-04 13:43:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:54,524 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-04 13:43:54,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:43:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-04 13:43:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:43:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:54,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:54,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-09-04 13:43:54,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:54,731 INFO L82 PathProgramCache]: Analyzing trace with hash -874117243, now seen corresponding path program 1 times [2020-09-04 13:43:54,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:54,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118142120] [2020-09-04 13:43:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:58,541 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-09-04 13:43:59,112 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2020-09-04 13:43:59,437 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 40 [2020-09-04 13:43:59,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:59,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118142120] [2020-09-04 13:43:59,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491600720] [2020-09-04 13:43:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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