java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:19,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:19,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:19,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:19,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:19,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:19,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:19,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:19,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:19,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:19,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:19,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:19,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:19,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:19,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:19,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:19,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:19,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:19,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:19,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:19,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:19,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:19,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:19,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:19,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:19,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:19,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:19,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:19,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:19,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:19,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:19,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:19,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:19,732 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:19,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:19,732 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:19,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:19,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:19,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:19,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:19,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:19,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:19,735 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:19,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:19,735 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:19,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:19,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:19,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:19,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:19,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:19,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:19,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:19,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:19,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:19,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:19,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:19,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:19,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:20,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:20,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:20,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:20,064 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:20,064 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:20,065 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-10-14 21:54:20,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d739e4c/ee448506665f4c3c923895b8c8e32bdf/FLAG6832713be [2019-10-14 21:54:20,747 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:20,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-10-14 21:54:20,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d739e4c/ee448506665f4c3c923895b8c8e32bdf/FLAG6832713be [2019-10-14 21:54:20,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7d739e4c/ee448506665f4c3c923895b8c8e32bdf [2019-10-14 21:54:20,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:20,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:20,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:20,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:20,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:20,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:20" (1/1) ... [2019-10-14 21:54:20,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137de84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:20, skipping insertion in model container [2019-10-14 21:54:20,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:20" (1/1) ... [2019-10-14 21:54:20,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:21,042 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:21,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:21,753 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:22,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:22,207 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:22,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22 WrapperNode [2019-10-14 21:54:22,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:22,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:22,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:22,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:22,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:22,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:22,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:22,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:22,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:22,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:22,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:24,479 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:24,480 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:24,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24 BoogieIcfgContainer [2019-10-14 21:54:24,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:24,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:24,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:24,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:24,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:20" (1/3) ... [2019-10-14 21:54:24,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b329531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (2/3) ... [2019-10-14 21:54:24,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b329531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24" (3/3) ... [2019-10-14 21:54:24,492 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2019-10-14 21:54:24,503 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:24,512 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:24,523 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:24,556 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:24,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:24,557 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:24,557 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:24,557 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:24,557 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:24,557 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:24,557 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 21:54:24,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:24,600 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:24,602 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1544332784, now seen corresponding path program 1 times [2019-10-14 21:54:24,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:24,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211573441] [2019-10-14 21:54:24,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:25,469 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:25,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211573441] [2019-10-14 21:54:25,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:25,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:25,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737620939] [2019-10-14 21:54:25,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:25,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:25,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:25,615 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:25,828 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:26,303 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:29,847 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-14 21:54:29,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:29,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2019-10-14 21:54:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:29,870 INFO L225 Difference]: With dead ends: 1107 [2019-10-14 21:54:29,870 INFO L226 Difference]: Without dead ends: 699 [2019-10-14 21:54:29,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-14 21:54:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-14 21:54:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-14 21:54:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-14 21:54:30,016 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 171 [2019-10-14 21:54:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:30,020 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-14 21:54:30,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-14 21:54:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 21:54:30,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:30,036 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:30,036 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash 606817572, now seen corresponding path program 1 times [2019-10-14 21:54:30,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:30,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670651292] [2019-10-14 21:54:30,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,403 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:30,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670651292] [2019-10-14 21:54:30,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655599630] [2019-10-14 21:54:30,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:30,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:30,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:30,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:30,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260259053] [2019-10-14 21:54:30,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:30,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:30,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:30,883 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 5 states. [2019-10-14 21:54:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:32,317 INFO L93 Difference]: Finished difference Result 1418 states and 2188 transitions. [2019-10-14 21:54:32,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:32,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-14 21:54:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:32,327 INFO L225 Difference]: With dead ends: 1418 [2019-10-14 21:54:32,327 INFO L226 Difference]: Without dead ends: 950 [2019-10-14 21:54:32,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-10-14 21:54:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 934. [2019-10-14 21:54:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 21:54:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1407 transitions. [2019-10-14 21:54:32,376 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1407 transitions. Word has length 183 [2019-10-14 21:54:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:32,377 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1407 transitions. [2019-10-14 21:54:32,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1407 transitions. [2019-10-14 21:54:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 21:54:32,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:32,382 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:32,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:32,586 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash 333587563, now seen corresponding path program 1 times [2019-10-14 21:54:32,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:32,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857144192] [2019-10-14 21:54:32,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:32,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:32,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:32,955 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:33,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857144192] [2019-10-14 21:54:33,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214662290] [2019-10-14 21:54:33,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:33,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:33,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:33,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:33,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:54:33,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038070135] [2019-10-14 21:54:33,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:33,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:33,502 INFO L87 Difference]: Start difference. First operand 934 states and 1407 transitions. Second operand 3 states. [2019-10-14 21:54:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:34,500 INFO L93 Difference]: Finished difference Result 2717 states and 4175 transitions. [2019-10-14 21:54:34,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:34,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2019-10-14 21:54:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:34,517 INFO L225 Difference]: With dead ends: 2717 [2019-10-14 21:54:34,517 INFO L226 Difference]: Without dead ends: 1789 [2019-10-14 21:54:34,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2019-10-14 21:54:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1786. [2019-10-14 21:54:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2019-10-14 21:54:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2565 transitions. [2019-10-14 21:54:34,588 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2565 transitions. Word has length 192 [2019-10-14 21:54:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:34,589 INFO L462 AbstractCegarLoop]: Abstraction has 1786 states and 2565 transitions. [2019-10-14 21:54:34,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2565 transitions. [2019-10-14 21:54:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 21:54:34,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:34,598 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:34,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:34,802 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash -298173772, now seen corresponding path program 1 times [2019-10-14 21:54:34,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:34,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051353368] [2019-10-14 21:54:34,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:34,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:34,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,094 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,234 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:35,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051353368] [2019-10-14 21:54:35,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277491281] [2019-10-14 21:54:35,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:35,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:35,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:35,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:54:35,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134670024] [2019-10-14 21:54:35,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:54:35,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:54:35,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:54:35,777 INFO L87 Difference]: Start difference. First operand 1786 states and 2565 transitions. Second operand 10 states. [2019-10-14 21:54:36,093 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:36,662 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2019-10-14 21:54:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:41,925 INFO L93 Difference]: Finished difference Result 7238 states and 12270 transitions. [2019-10-14 21:54:41,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:41,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 202 [2019-10-14 21:54:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:41,968 INFO L225 Difference]: With dead ends: 7238 [2019-10-14 21:54:41,969 INFO L226 Difference]: Without dead ends: 5458 [2019-10-14 21:54:41,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:54:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2019-10-14 21:54:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5354. [2019-10-14 21:54:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5354 states. [2019-10-14 21:54:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 8036 transitions. [2019-10-14 21:54:42,178 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 8036 transitions. Word has length 202 [2019-10-14 21:54:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:42,178 INFO L462 AbstractCegarLoop]: Abstraction has 5354 states and 8036 transitions. [2019-10-14 21:54:42,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:54:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 8036 transitions. [2019-10-14 21:54:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:54:42,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:42,205 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:42,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:42,410 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1511831219, now seen corresponding path program 1 times [2019-10-14 21:54:42,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:42,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684982950] [2019-10-14 21:54:42,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,776 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:43,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684982950] [2019-10-14 21:54:43,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310055216] [2019-10-14 21:54:43,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:43,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:54:43,425 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:43,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2019-10-14 21:54:43,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501247693] [2019-10-14 21:54:43,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:54:43,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:43,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:54:43,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:54:43,433 INFO L87 Difference]: Start difference. First operand 5354 states and 8036 transitions. Second operand 12 states. [2019-10-14 21:54:43,651 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:44,051 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:44,189 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:45,282 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2019-10-14 21:54:45,526 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:46,809 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2019-10-14 21:54:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:51,655 INFO L93 Difference]: Finished difference Result 31093 states and 57032 transitions. [2019-10-14 21:54:51,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:54:51,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 203 [2019-10-14 21:54:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:51,941 INFO L225 Difference]: With dead ends: 31093 [2019-10-14 21:54:51,943 INFO L226 Difference]: Without dead ends: 25745 [2019-10-14 21:54:52,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:54:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25745 states. [2019-10-14 21:54:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25745 to 25257. [2019-10-14 21:54:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25257 states. [2019-10-14 21:54:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25257 states to 25257 states and 40143 transitions. [2019-10-14 21:54:53,298 INFO L78 Accepts]: Start accepts. Automaton has 25257 states and 40143 transitions. Word has length 203 [2019-10-14 21:54:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:53,298 INFO L462 AbstractCegarLoop]: Abstraction has 25257 states and 40143 transitions. [2019-10-14 21:54:53,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:54:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25257 states and 40143 transitions. [2019-10-14 21:54:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-14 21:54:53,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:53,419 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:53,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:53,624 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1499509589, now seen corresponding path program 1 times [2019-10-14 21:54:53,626 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:53,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940033902] [2019-10-14 21:54:53,626 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:54:54,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940033902] [2019-10-14 21:54:54,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087452430] [2019-10-14 21:54:54,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:54,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:54:54,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:54,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:54,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014699824] [2019-10-14 21:54:54,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:54,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:54,640 INFO L87 Difference]: Start difference. First operand 25257 states and 40143 transitions. Second operand 3 states.