/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:45:47,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:45:47,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:45:47,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:45:47,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:45:47,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:45:47,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:45:47,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:45:47,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:45:47,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:45:47,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:45:47,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:45:47,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:45:47,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:45:47,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:45:47,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:45:47,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:45:47,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:45:47,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:45:47,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:45:47,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:45:47,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:45:47,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:45:47,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:45:47,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:45:47,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:45:47,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:45:47,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:45:47,604 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 [2020-07-19 21:45:47,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:45:47,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:45:47,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:45:47,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:45:47,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:45:47,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:45:47,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:45:47,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:45:47,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:45:47,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:45:47,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:45:47,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:45:47,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:45:47,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:45:47,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:45:47,623 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:45:47,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:45:47,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:45:47,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:45:47,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:45:47,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:45:47,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:45:47,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:45:47,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:45:47,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:45:47,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:45:47,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:45:47,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:45:47,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:45:47,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:45:48,009 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:45:48,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:45:48,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:45:48,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:45:48,028 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:45:48,029 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-19 21:45:48,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274c3afe1/b180c158675e4be7b607c539e01f6f25/FLAG1e01bd531 [2020-07-19 21:45:48,556 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:45:48,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-19 21:45:48,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274c3afe1/b180c158675e4be7b607c539e01f6f25/FLAG1e01bd531 [2020-07-19 21:45:48,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274c3afe1/b180c158675e4be7b607c539e01f6f25 [2020-07-19 21:45:48,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:45:48,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:45:48,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:48,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:45:48,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:45:48,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:48" (1/1) ... [2020-07-19 21:45:48,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bef7c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:48, skipping insertion in model container [2020-07-19 21:45:48,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:48" (1/1) ... [2020-07-19 21:45:49,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:45:49,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:45:49,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:49,303 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:45:49,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:49,467 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:45:49,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49 WrapperNode [2020-07-19 21:45:49,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:49,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:45:49,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:45:49,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:45:49,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (1/1) ... [2020-07-19 21:45:49,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:45:49,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:45:49,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:45:49,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:45:49,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (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 [2020-07-19 21:45:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:45:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:45:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:45:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-19 21:45:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:45:49,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-19 21:45:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:45:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:45:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-19 21:45:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-19 21:45:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:45:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-19 21:45:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-19 21:45:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:45:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:45:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:45:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:45:50,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:45:50,131 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-19 21:45:50,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:50 BoogieIcfgContainer [2020-07-19 21:45:50,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:45:50,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:45:50,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:45:50,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:45:50,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:48" (1/3) ... [2020-07-19 21:45:50,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ac931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:50, skipping insertion in model container [2020-07-19 21:45:50,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:49" (2/3) ... [2020-07-19 21:45:50,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ac931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:50, skipping insertion in model container [2020-07-19 21:45:50,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:50" (3/3) ... [2020-07-19 21:45:50,145 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-19 21:45:50,156 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:45:50,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:45:50,178 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:45:50,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:45:50,203 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:45:50,203 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:45:50,203 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:45:50,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:45:50,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:45:50,204 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:45:50,204 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:45:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-19 21:45:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-19 21:45:50,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:50,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:50,229 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-19 21:45:50,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:50,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796913239] [2020-07-19 21:45:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:50,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796913239] [2020-07-19 21:45:50,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:50,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:45:50,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907269618] [2020-07-19 21:45:50,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:45:50,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:45:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:45:50,498 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-19 21:45:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:50,739 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-07-19 21:45:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:45:50,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-19 21:45:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:50,750 INFO L225 Difference]: With dead ends: 127 [2020-07-19 21:45:50,751 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:45:50,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:45:50,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:45:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-07-19 21:45:50,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-19 21:45:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-19 21:45:50,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-19 21:45:50,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:50,801 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-19 21:45:50,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:45:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-19 21:45:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-19 21:45:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:50,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:50,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:45:50,803 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:50,804 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-19 21:45:50,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:50,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619027122] [2020-07-19 21:45:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:50,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619027122] [2020-07-19 21:45:50,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:50,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:45:50,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535226703] [2020-07-19 21:45:50,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:45:50,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:50,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:45:50,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:45:50,953 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-19 21:45:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:51,092 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-19 21:45:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:45:51,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-19 21:45:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:51,094 INFO L225 Difference]: With dead ends: 40 [2020-07-19 21:45:51,094 INFO L226 Difference]: Without dead ends: 26 [2020-07-19 21:45:51,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:45:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-19 21:45:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-07-19 21:45:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:45:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-19 21:45:51,102 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-19 21:45:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:51,102 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-19 21:45:51,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:45:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-19 21:45:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:45:51,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:51,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:51,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:45:51,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-19 21:45:51,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:51,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178032612] [2020-07-19 21:45:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:51,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178032612] [2020-07-19 21:45:51,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:51,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:45:51,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844624955] [2020-07-19 21:45:51,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:45:51,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:51,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:45:51,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:45:51,197 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-07-19 21:45:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:51,329 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 21:45:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:45:51,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-19 21:45:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:51,331 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:45:51,331 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 21:45:51,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:45:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 21:45:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-07-19 21:45:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 21:45:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-19 21:45:51,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-07-19 21:45:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:51,340 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-19 21:45:51,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:45:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-19 21:45:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:45:51,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:51,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:51,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 21:45:51,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:51,342 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-07-19 21:45:51,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:51,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535711797] [2020-07-19 21:45:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:45:51,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535711797] [2020-07-19 21:45:51,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:51,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 21:45:51,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503650483] [2020-07-19 21:45:51,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:45:51,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:45:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:45:51,458 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-07-19 21:45:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:51,675 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-19 21:45:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:45:51,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-19 21:45:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:51,676 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:45:51,676 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:45:51,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:45:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:45:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-19 21:45:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:45:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 21:45:51,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-07-19 21:45:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:51,687 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 21:45:51,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:45:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 21:45:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:45:51,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:51,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:51,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 21:45:51,689 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-07-19 21:45:51,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753239467] [2020-07-19 21:45:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 21:45:51,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753239467] [2020-07-19 21:45:51,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530246133] [2020-07-19 21:45:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba 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 [2020-07-19 21:45:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:45:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:45:51,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:51,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-19 21:45:51,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415652105] [2020-07-19 21:45:51,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:45:51,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:45:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:45:51,968 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-07-19 21:45:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:52,120 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-19 21:45:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:45:52,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-19 21:45:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:52,123 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:45:52,124 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:45:52,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:45:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:45:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-19 21:45:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 21:45:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-19 21:45:52,133 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-07-19 21:45:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:52,133 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-19 21:45:52,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:45:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-19 21:45:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:45:52,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:52,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:52,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:52,351 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-07-19 21:45:52,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:52,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106962601] [2020-07-19 21:45:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 21:45:52,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106962601] [2020-07-19 21:45:52,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933702671] [2020-07-19 21:45:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba 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 [2020-07-19 21:45:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:45:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-19 21:45:52,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:52,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-19 21:45:52,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299769498] [2020-07-19 21:45:52,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:45:52,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:45:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:45:52,586 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-07-19 21:45:52,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:52,753 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-07-19 21:45:52,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:45:52,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-19 21:45:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:52,755 INFO L225 Difference]: With dead ends: 78 [2020-07-19 21:45:52,755 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:45:52,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:45:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:45:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-19 21:45:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:45:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-07-19 21:45:52,764 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-07-19 21:45:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:52,765 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-07-19 21:45:52,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:45:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-07-19 21:45:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 21:45:52,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:52,766 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:52,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-07-19 21:45:52,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:52,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539561068] [2020-07-19 21:45:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 21:45:53,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539561068] [2020-07-19 21:45:53,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657043549] [2020-07-19 21:45:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba 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 [2020-07-19 21:45:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:45:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-19 21:45:53,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:53,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-19 21:45:53,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478169819] [2020-07-19 21:45:53,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:45:53,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:45:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:45:53,273 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 12 states. [2020-07-19 21:45:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:53,429 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-07-19 21:45:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:45:53,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-19 21:45:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:53,431 INFO L225 Difference]: With dead ends: 90 [2020-07-19 21:45:53,431 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 21:45:53,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:45:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 21:45:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-07-19 21:45:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-19 21:45:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-19 21:45:53,440 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-07-19 21:45:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:53,441 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-19 21:45:53,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:45:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-19 21:45:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-19 21:45:53,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:53,443 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:53,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:53,659 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:53,660 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-07-19 21:45:53,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:53,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904950702] [2020-07-19 21:45:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-19 21:45:53,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904950702] [2020-07-19 21:45:53,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544291308] [2020-07-19 21:45:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:45:53,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-19 21:45:53,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:53,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-19 21:45:53,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041848288] [2020-07-19 21:45:53,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:45:53,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:45:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:45:53,952 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-07-19 21:45:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:54,156 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-07-19 21:45:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:45:54,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-19 21:45:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:54,158 INFO L225 Difference]: With dead ends: 102 [2020-07-19 21:45:54,162 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 21:45:54,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:45:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 21:45:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-19 21:45:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-19 21:45:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-07-19 21:45:54,178 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-07-19 21:45:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:54,178 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-07-19 21:45:54,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:45:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-07-19 21:45:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 21:45:54,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:54,183 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:54,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:54,403 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-07-19 21:45:54,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:54,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269097599] [2020-07-19 21:45:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-19 21:45:54,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269097599] [2020-07-19 21:45:54,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979077362] [2020-07-19 21:45:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba 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 [2020-07-19 21:45:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:45:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-19 21:45:54,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:54,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-07-19 21:45:54,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079299796] [2020-07-19 21:45:54,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:45:54,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:54,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:45:54,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:45:54,705 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-07-19 21:45:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:54,901 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-07-19 21:45:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:45:54,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-07-19 21:45:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:54,903 INFO L225 Difference]: With dead ends: 114 [2020-07-19 21:45:54,903 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:45:54,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:45:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:45:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-19 21:45:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 21:45:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-19 21:45:54,913 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-07-19 21:45:54,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:54,914 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-19 21:45:54,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:45:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-19 21:45:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-19 21:45:54,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:54,915 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:55,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:55,129 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-07-19 21:45:55,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:55,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385754420] [2020-07-19 21:45:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-19 21:45:55,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385754420] [2020-07-19 21:45:55,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802586269] [2020-07-19 21:45:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba 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 [2020-07-19 21:45:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:45:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-19 21:45:55,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:55,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 21:45:55,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038791590] [2020-07-19 21:45:55,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:45:55,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:45:55,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:45:55,370 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-19 21:45:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:55,576 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-19 21:45:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:45:55,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-19 21:45:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:55,578 INFO L225 Difference]: With dead ends: 168 [2020-07-19 21:45:55,578 INFO L226 Difference]: Without dead ends: 133 [2020-07-19 21:45:55,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:45:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-19 21:45:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-19 21:45:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 21:45:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-19 21:45:55,589 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-19 21:45:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:55,589 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-19 21:45:55,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:45:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-19 21:45:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-19 21:45:55,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:55,591 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:55,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:55,806 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-07-19 21:45:55,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:55,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629190306] [2020-07-19 21:45:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-19 21:45:55,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629190306] [2020-07-19 21:45:55,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653699323] [2020-07-19 21:45:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:45:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:56,007 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:45:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-19 21:45:56,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:56,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-19 21:45:56,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789113034] [2020-07-19 21:45:56,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:45:56,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:45:56,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:45:56,032 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2020-07-19 21:45:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:56,253 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-07-19 21:45:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:45:56,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-19 21:45:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:56,255 INFO L225 Difference]: With dead ends: 109 [2020-07-19 21:45:56,255 INFO L226 Difference]: Without dead ends: 107 [2020-07-19 21:45:56,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:45:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-19 21:45:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-07-19 21:45:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-19 21:45:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-07-19 21:45:56,265 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-07-19 21:45:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:56,265 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-07-19 21:45:56,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:45:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-07-19 21:45:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 21:45:56,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:56,267 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:56,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:56,482 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-07-19 21:45:56,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:56,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509743126] [2020-07-19 21:45:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-07-19 21:45:56,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509743126] [2020-07-19 21:45:56,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046871998] [2020-07-19 21:45:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:45:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 297 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-19 21:45:56,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:56,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-19 21:45:56,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935681742] [2020-07-19 21:45:56,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:45:56,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:45:56,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:45:56,809 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 13 states. [2020-07-19 21:45:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:57,208 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-07-19 21:45:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:45:57,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-07-19 21:45:57,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:57,210 INFO L225 Difference]: With dead ends: 181 [2020-07-19 21:45:57,210 INFO L226 Difference]: Without dead ends: 146 [2020-07-19 21:45:57,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:45:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-19 21:45:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-07-19 21:45:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-19 21:45:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-07-19 21:45:57,223 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 102 [2020-07-19 21:45:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:57,223 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-07-19 21:45:57,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:45:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-07-19 21:45:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-19 21:45:57,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:57,225 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:57,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 21:45:57,440 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:57,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 9 times [2020-07-19 21:45:57,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:57,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591792819] [2020-07-19 21:45:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-19 21:45:57,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591792819] [2020-07-19 21:45:57,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876321335] [2020-07-19 21:45:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:45:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 254 proven. 768 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-19 21:45:57,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:57,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-07-19 21:45:57,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035546130] [2020-07-19 21:45:57,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:45:57,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:45:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:45:57,858 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 16 states. [2020-07-19 21:45:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:58,318 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-07-19 21:45:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:45:58,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-07-19 21:45:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:58,321 INFO L225 Difference]: With dead ends: 212 [2020-07-19 21:45:58,321 INFO L226 Difference]: Without dead ends: 177 [2020-07-19 21:45:58,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:45:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-19 21:45:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2020-07-19 21:45:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-19 21:45:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-07-19 21:45:58,337 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 135 [2020-07-19 21:45:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:58,338 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-07-19 21:45:58,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:45:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-07-19 21:45:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-19 21:45:58,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:58,343 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:58,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:58,558 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 10 times [2020-07-19 21:45:58,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:58,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765324532] [2020-07-19 21:45:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-19 21:45:58,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765324532] [2020-07-19 21:45:58,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58499515] [2020-07-19 21:45:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:58,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:45:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-19 21:45:59,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:59,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-07-19 21:45:59,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206425049] [2020-07-19 21:45:59,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:45:59,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:45:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:45:59,122 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 19 states. [2020-07-19 21:45:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:59,708 INFO L93 Difference]: Finished difference Result 243 states and 283 transitions. [2020-07-19 21:45:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:45:59,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 168 [2020-07-19 21:45:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:59,710 INFO L225 Difference]: With dead ends: 243 [2020-07-19 21:45:59,710 INFO L226 Difference]: Without dead ends: 208 [2020-07-19 21:45:59,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:45:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-19 21:45:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-19 21:45:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-19 21:45:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-07-19 21:45:59,723 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 168 [2020-07-19 21:45:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:59,724 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-07-19 21:45:59,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:45:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-07-19 21:45:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-19 21:45:59,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:59,727 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 31, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:59,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:59,940 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 948653961, now seen corresponding path program 11 times [2020-07-19 21:45:59,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:59,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174726174] [2020-07-19 21:45:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba [2020-07-19 21:45:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-07-19 21:46:00,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174726174] [2020-07-19 21:46:00,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668264878] [2020-07-19 21:46:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@82566ba No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:46:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:00,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:46:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:46:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 126 proven. 2355 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2020-07-19 21:46:00,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:46:00,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2020-07-19 21:46:00,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7347232] [2020-07-19 21:46:00,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:46:00,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:46:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:46:00,597 INFO L87 Difference]: Start difference. First operand 204 states and 231 transitions. Second operand 19 states. [2020-07-19 21:46:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:01,799 INFO L93 Difference]: Finished difference Result 271 states and 315 transitions. [2020-07-19 21:46:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:46:01,800 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-19 21:46:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:01,801 INFO L225 Difference]: With dead ends: 271 [2020-07-19 21:46:01,801 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:46:01,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:46:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:46:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:46:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:46:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:46:01,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-07-19 21:46:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:01,804 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:46:01,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:46:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:46:01,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:46:02,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:46:02,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:46:02,285 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-19 21:46:02,285 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-19 21:46:02,285 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-19 21:46:02,285 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-19 21:46:02,285 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-19 21:46:02,286 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-19 21:46:02,287 INFO L264 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: (and (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |old(#length)| |#length|)) [2020-07-19 21:46:02,287 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-19 21:46:02,287 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-19 21:46:02,287 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-19 21:46:02,287 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-19 21:46:02,287 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-19 21:46:02,288 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-19 21:46:02,289 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-19 21:46:02,289 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-19 21:46:02,289 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-19 21:46:02,289 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-19 21:46:02,289 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-19 21:46:02,289 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:02,289 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#a~0.base| |old(~#a~0.base)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#x~0.offset| |old(~#x~0.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |old(#length)| |#length|)) [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:02,290 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:46:02,291 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:46:02,291 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:02,291 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-19 21:46:02,291 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-19 21:46:02,291 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-19 21:46:02,291 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-19 21:46:02,291 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-07-19 21:46:02,292 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-19 21:46:02,292 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-19 21:46:02,292 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-19 21:46:02,292 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-19 21:46:02,292 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: (and (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |old(#length)| |#length|)) [2020-07-19 21:46:02,292 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-19 21:46:02,292 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-19 21:46:02,292 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-19 21:46:02,293 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-19 21:46:02,293 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:46:02,293 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 21:46:02,293 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-19 21:46:02,293 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-19 21:46:02,293 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-19 21:46:02,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:46:02 BoogieIcfgContainer [2020-07-19 21:46:02,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:46:02,315 INFO L168 Benchmark]: Toolchain (without parser) took 13333.35 ms. Allocated memory was 149.4 MB in the beginning and 337.1 MB in the end (delta: 187.7 MB). Free memory was 106.9 MB in the beginning and 131.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 163.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,315 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 149.4 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 483.89 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 106.5 MB in the beginning and 179.7 MB in the end (delta: -73.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,317 INFO L168 Benchmark]: Boogie Preprocessor took 54.62 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,317 INFO L168 Benchmark]: RCFGBuilder took 613.08 ms. Allocated memory is still 203.4 MB. Free memory was 177.3 MB in the beginning and 150.1 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,318 INFO L168 Benchmark]: TraceAbstraction took 12174.76 ms. Allocated memory was 203.4 MB in the beginning and 337.1 MB in the end (delta: 133.7 MB). Free memory was 149.5 MB in the beginning and 131.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:02,321 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 149.4 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 483.89 ms. Allocated memory was 149.4 MB in the beginning and 203.4 MB in the end (delta: 54.0 MB). Free memory was 106.5 MB in the beginning and 179.7 MB in the end (delta: -73.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.62 ms. Allocated memory is still 203.4 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 613.08 ms. Allocated memory is still 203.4 MB. Free memory was 177.3 MB in the beginning and 150.1 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12174.76 ms. Allocated memory was 203.4 MB in the beginning and 337.1 MB in the end (delta: 133.7 MB). Free memory was 149.5 MB in the beginning and 131.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (n <= 5 && 5 <= n) && i <= 5 - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: n <= 5 && 5 <= n - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.8s, OverallIterations: 15, TraceHistogramMax: 36, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 336 SDtfs, 529 SDslu, 1106 SDs, 0 SdLazy, 3276 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1180 GetRequests, 991 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 122 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 68 PreInvPairs, 153 NumberOfFragments, 96 HoareAnnotationTreeSize, 68 FomulaSimplifications, 2723 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 21 FomulaSimplificationsInter, 393 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 1994 NumberOfCodeBlocks, 1994 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1968 ConstructedInterpolants, 0 QuantifiedInterpolants, 694348 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2483 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 6293/15588 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 correct! Received shutdown request...