/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:32:55,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:32:55,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:32:55,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:32:55,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:32:55,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:32:55,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:32:55,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:32:55,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:32:55,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:32:55,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:32:55,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:32:55,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:32:55,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:32:55,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:32:55,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:32:55,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:32:55,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:32:55,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:32:55,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:32:55,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:32:55,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:32:55,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:32:55,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:32:55,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:32:55,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:32:55,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:32:55,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:32:55,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:32:55,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:32:55,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:32:55,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:32:55,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:32:55,519 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:32:55,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:32:55,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:32:55,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:32:55,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:32:55,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:32:55,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:32:55,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:32:55,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:32:55,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:32:55,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:32:55,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:32:55,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:32:55,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:32:55,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:32:55,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:32:55,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:32:55,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:55,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:32:55,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:32:55,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:32:55,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:32:55,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:32:55,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:32:55,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:32:55,826 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:32:55,827 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-07-07 11:32:55,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d64064058/dad86940a39a4e82bbe7af9905664349/FLAGd35b4f3bd [2020-07-07 11:32:56,366 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:32:56,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-07-07 11:32:56,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d64064058/dad86940a39a4e82bbe7af9905664349/FLAGd35b4f3bd [2020-07-07 11:32:56,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d64064058/dad86940a39a4e82bbe7af9905664349 [2020-07-07 11:32:56,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:32:56,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:32:56,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:56,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:32:56,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:32:56,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:56" (1/1) ... [2020-07-07 11:32:56,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577a074b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:56, skipping insertion in model container [2020-07-07 11:32:56,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:56" (1/1) ... [2020-07-07 11:32:56,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:32:56,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:32:56,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:56,977 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:32:56,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:57,015 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:32:57,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57 WrapperNode [2020-07-07 11:32:57,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:57,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:32:57,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:32:57,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:32:57,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... [2020-07-07 11:32:57,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:32:57,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:32:57,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:32:57,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:32:57,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:32:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:32:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:32:57,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:32:57,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:32:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:32:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:32:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:32:57,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:32:57,429 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:32:57,429 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:32:57,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:57 BoogieIcfgContainer [2020-07-07 11:32:57,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:32:57,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:32:57,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:32:57,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:32:57,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:32:56" (1/3) ... [2020-07-07 11:32:57,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d026c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:57, skipping insertion in model container [2020-07-07 11:32:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:57" (2/3) ... [2020-07-07 11:32:57,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d026c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:57, skipping insertion in model container [2020-07-07 11:32:57,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:57" (3/3) ... [2020-07-07 11:32:57,442 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-07-07 11:32:57,452 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:32:57,459 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:32:57,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:32:57,497 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:32:57,497 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:32:57,497 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:32:57,498 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:32:57,498 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:32:57,498 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:32:57,498 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:32:57,498 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:32:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-07 11:32:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:32:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:57,523 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-07 11:32:57,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:57,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3235462] [2020-07-07 11:32:57,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3235462] [2020-07-07 11:32:57,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:57,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:32:57,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221411852] [2020-07-07 11:32:57,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:32:57,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:32:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:32:57,663 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-07 11:32:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:57,682 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-07 11:32:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:32:57,684 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-07 11:32:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:57,692 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:32:57,692 INFO L226 Difference]: Without dead ends: 13 [2020-07-07 11:32:57,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:32:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-07 11:32:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-07 11:32:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-07 11:32:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-07 11:32:57,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-07 11:32:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:57,732 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-07 11:32:57,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:32:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-07 11:32:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:32:57,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:57,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:32:57,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-07-07 11:32:57,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:57,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113075119] [2020-07-07 11:32:57,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113075119] [2020-07-07 11:32:57,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:57,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:32:57,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612063069] [2020-07-07 11:32:57,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:32:57,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:32:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:57,840 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-07-07 11:32:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:57,874 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-07-07 11:32:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:32:57,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-07 11:32:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:57,876 INFO L225 Difference]: With dead ends: 24 [2020-07-07 11:32:57,877 INFO L226 Difference]: Without dead ends: 16 [2020-07-07 11:32:57,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-07 11:32:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-07 11:32:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-07 11:32:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-07 11:32:57,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-07 11:32:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:57,886 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-07 11:32:57,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:32:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-07 11:32:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:32:57,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:57,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:57,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:32:57,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-07-07 11:32:57,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:57,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412583765] [2020-07-07 11:32:57,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:57,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412583765] [2020-07-07 11:32:57,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763260268] [2020-07-07 11:32:57,944 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 [2020-07-07 11:32:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:57,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:32:57,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:58,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-07-07 11:32:58,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118953827] [2020-07-07 11:32:58,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:32:58,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:32:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:58,034 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-07-07 11:32:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:58,089 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-07 11:32:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:32:58,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-07 11:32:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:58,090 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:32:58,091 INFO L226 Difference]: Without dead ends: 19 [2020-07-07 11:32:58,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-07 11:32:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-07-07 11:32:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:32:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:32:58,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:32:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:58,097 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:32:58,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:32:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:32:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-07 11:32:58,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:58,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:58,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:32:58,300 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-07-07 11:32:58,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:58,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710541640] [2020-07-07 11:32:58,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710541640] [2020-07-07 11:32:58,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21721331] [2020-07-07 11:32:58,374 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 [2020-07-07 11:32:58,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:58,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:58,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:32:58,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:58,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-07 11:32:58,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244436870] [2020-07-07 11:32:58,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:32:58,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:32:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:32:58,428 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-07-07 11:32:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:58,468 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-07 11:32:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:32:58,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-07 11:32:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:58,470 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:32:58,470 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 11:32:58,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:32:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 11:32:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-07 11:32:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:32:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:32:58,476 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-07-07 11:32:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:58,477 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:32:58,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:32:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:32:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:32:58,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:58,478 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:58,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:58,687 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:58,688 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-07-07 11:32:58,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:58,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112852066] [2020-07-07 11:32:58,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:32:58,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112852066] [2020-07-07 11:32:58,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:58,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:32:58,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851024253] [2020-07-07 11:32:58,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:32:58,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:32:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:58,759 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-07-07 11:32:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:58,796 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-07-07 11:32:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:32:58,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-07 11:32:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:58,801 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:32:58,801 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 11:32:58,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 11:32:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-07-07 11:32:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:32:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-07 11:32:58,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-07-07 11:32:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:58,810 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-07 11:32:58,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:32:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-07 11:32:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:32:58,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:58,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:58,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:32:58,813 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-07-07 11:32:58,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:58,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125096741] [2020-07-07 11:32:58,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:32:58,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125096741] [2020-07-07 11:32:58,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81403697] [2020-07-07 11:32:58,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:58,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:58,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:58,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:58,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2020-07-07 11:32:58,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211221319] [2020-07-07 11:32:58,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:32:58,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:32:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:58,935 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-07 11:32:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:59,002 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-07 11:32:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:32:59,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 11:32:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:59,011 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:32:59,012 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 11:32:59,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 11:32:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-07 11:32:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 11:32:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-07 11:32:59,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-07-07 11:32:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:59,021 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-07 11:32:59,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-07 11:32:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:32:59,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:59,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:59,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:59,233 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-07-07 11:32:59,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:59,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810501993] [2020-07-07 11:32:59,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:32:59,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810501993] [2020-07-07 11:32:59,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214549609] [2020-07-07 11:32:59,330 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-07 11:32:59,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:59,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:59,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:59,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:59,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:59,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2020-07-07 11:32:59,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615293305] [2020-07-07 11:32:59,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:32:59,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:59,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:32:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:32:59,405 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-07-07 11:32:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:59,456 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-07 11:32:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:32:59,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-07 11:32:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:59,457 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:32:59,457 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 11:32:59,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:32:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 11:32:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-07 11:32:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:32:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-07 11:32:59,463 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-07-07 11:32:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:59,464 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-07 11:32:59,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:32:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-07 11:32:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:59,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:59,465 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:59,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:59,678 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-07-07 11:32:59,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:59,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861239903] [2020-07-07 11:32:59,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:32:59,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861239903] [2020-07-07 11:32:59,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900811653] [2020-07-07 11:32:59,755 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:59,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-07-07 11:32:59,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:59,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:59,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:32:59,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:59,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-07 11:32:59,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137143772] [2020-07-07 11:32:59,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:32:59,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:59,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:32:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:59,804 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-07-07 11:32:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:59,857 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-07 11:32:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:32:59,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-07 11:32:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:59,859 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:32:59,859 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:32:59,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:32:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-07 11:32:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:32:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-07 11:32:59,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-07-07 11:32:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:59,866 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-07 11:32:59,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-07 11:32:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:32:59,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:59,867 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:00,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:00,081 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:00,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-07-07 11:33:00,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:00,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794245624] [2020-07-07 11:33:00,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:33:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:33:00,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794245624] [2020-07-07 11:33:00,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725961764] [2020-07-07 11:33:00,163 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:00,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:33:00,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:33:00,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 11:33:00,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:33:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:33:00,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:33:00,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2020-07-07 11:33:00,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184381986] [2020-07-07 11:33:00,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:33:00,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:33:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:33:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:33:00,224 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-07-07 11:33:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:33:00,276 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-07 11:33:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:33:00,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-07 11:33:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:33:00,278 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:33:00,278 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 11:33:00,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:33:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 11:33:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-07 11:33:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 11:33:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-07 11:33:00,284 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-07-07 11:33:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:33:00,284 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-07 11:33:00,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:33:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-07 11:33:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:33:00,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:33:00,285 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:33:00,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:33:00,497 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:33:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:33:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-07-07 11:33:00,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:33:00,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644460432] [2020-07-07 11:33:00,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:33:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:33:00,536 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:33:00,536 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:33:00,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:33:00,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:33:00 BoogieIcfgContainer [2020-07-07 11:33:00,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:33:00,563 INFO L168 Benchmark]: Toolchain (without parser) took 3813.30 ms. Allocated memory was 136.8 MB in the beginning and 232.8 MB in the end (delta: 95.9 MB). Free memory was 101.6 MB in the beginning and 134.8 MB in the end (delta: -33.2 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:00,564 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:33:00,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.85 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:00,566 INFO L168 Benchmark]: Boogie Preprocessor took 156.49 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 92.3 MB in the beginning and 183.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:00,566 INFO L168 Benchmark]: RCFGBuilder took 259.17 ms. Allocated memory is still 203.4 MB. Free memory was 183.2 MB in the beginning and 170.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:00,567 INFO L168 Benchmark]: TraceAbstraction took 3127.00 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 169.9 MB in the beginning and 134.8 MB in the end (delta: 35.1 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:33:00,571 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory is still 119.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.85 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.49 ms. Allocated memory was 136.8 MB in the beginning and 203.4 MB in the end (delta: 66.6 MB). Free memory was 92.3 MB in the beginning and 183.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.17 ms. Allocated memory is still 203.4 MB. Free memory was 183.2 MB in the beginning and 170.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3127.00 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 169.9 MB in the beginning and 134.8 MB in the end (delta: 35.1 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 69 SDslu, 216 SDs, 0 SdLazy, 156 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 343 NumberOfCodeBlocks, 342 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 12474 SizeOfPredicates, 5 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 176/380 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...