/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:13:06,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:13:06,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:13:06,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:13:06,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:13:06,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:13:06,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:13:06,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:13:06,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:13:06,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:13:06,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:13:06,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:13:06,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:13:06,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:13:06,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:13:06,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:13:06,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:13:06,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:13:06,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:13:06,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:13:06,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:13:06,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:13:06,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:13:06,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:13:06,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:13:06,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:13:06,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:13:06,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:13:06,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:13:06,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:13:06,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:13:06,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:13:06,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:13:06,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:13:06,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:13:06,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:13:06,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:13:06,583 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:13:06,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:13:06,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:13:06,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:13:06,585 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:13:06,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:13:06,586 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:13:06,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:13:06,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:13:06,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:13:06,588 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:13:06,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:13:06,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:13:06,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:13:06,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:13:06,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:13:06,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:06,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:13:06,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:13:06,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:13:06,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:13:06,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:13:06,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:13:06,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:13:06,916 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:13:06,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:13:06,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:13:06,937 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:13:06,937 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:13:06,938 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:07,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc03a2b8/0b90b68350d54996a8085d8a3c9b457b/FLAG97ae8420e [2019-11-06 22:13:07,551 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:13:07,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:07,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc03a2b8/0b90b68350d54996a8085d8a3c9b457b/FLAG97ae8420e [2019-11-06 22:13:07,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fc03a2b8/0b90b68350d54996a8085d8a3c9b457b [2019-11-06 22:13:07,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:13:07,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:13:07,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:07,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:13:07,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:13:07,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:07" (1/1) ... [2019-11-06 22:13:07,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238a7b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:07, skipping insertion in model container [2019-11-06 22:13:07,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:07" (1/1) ... [2019-11-06 22:13:07,850 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:13:07,925 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:13:08,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:08,467 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:13:08,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:08,654 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:13:08,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08 WrapperNode [2019-11-06 22:13:08,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:08,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:13:08,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:13:08,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:13:08,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... [2019-11-06 22:13:08,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:13:08,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:13:08,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:13:08,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:13:08,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:08,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:13:08,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:13:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:13:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:13:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:13:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:13:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:13:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:13:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:13:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:13:10,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:13:10,382 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:13:10,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:10 BoogieIcfgContainer [2019-11-06 22:13:10,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:13:10,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:13:10,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:13:10,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:13:10,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:07" (1/3) ... [2019-11-06 22:13:10,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bb0a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:10, skipping insertion in model container [2019-11-06 22:13:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:08" (2/3) ... [2019-11-06 22:13:10,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bb0a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:10, skipping insertion in model container [2019-11-06 22:13:10,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:10" (3/3) ... [2019-11-06 22:13:10,401 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:10,411 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:13:10,430 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:13:10,441 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:13:10,469 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:13:10,469 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:13:10,469 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:13:10,469 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:13:10,470 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:13:10,470 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:13:10,470 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:13:10,470 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:13:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states. [2019-11-06 22:13:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:13:10,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:10,526 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:10,528 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:10,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash 885340602, now seen corresponding path program 1 times [2019-11-06 22:13:10,543 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:10,543 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421070164] [2019-11-06 22:13:10,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:11,488 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:11,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421070164] [2019-11-06 22:13:11,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:11,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:11,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603550070] [2019-11-06 22:13:11,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:11,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:11,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:11,602 INFO L87 Difference]: Start difference. First operand 317 states. Second operand 4 states. [2019-11-06 22:13:11,895 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:13:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:13,635 INFO L93 Difference]: Finished difference Result 641 states and 1120 transitions. [2019-11-06 22:13:13,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:13,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-11-06 22:13:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:13,656 INFO L225 Difference]: With dead ends: 641 [2019-11-06 22:13:13,656 INFO L226 Difference]: Without dead ends: 514 [2019-11-06 22:13:13,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2019-11-06 22:13:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2019-11-06 22:13:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2019-11-06 22:13:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 761 transitions. [2019-11-06 22:13:13,799 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 761 transitions. Word has length 150 [2019-11-06 22:13:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:13,800 INFO L462 AbstractCegarLoop]: Abstraction has 512 states and 761 transitions. [2019-11-06 22:13:13,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 761 transitions. [2019-11-06 22:13:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:13:13,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:13,807 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:13,807 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:13,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash -20093490, now seen corresponding path program 1 times [2019-11-06 22:13:13,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:13,808 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351754682] [2019-11-06 22:13:13,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:14,189 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:14,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351754682] [2019-11-06 22:13:14,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:14,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:14,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570722173] [2019-11-06 22:13:14,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:14,238 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:14,239 INFO L87 Difference]: Start difference. First operand 512 states and 761 transitions. Second operand 4 states. [2019-11-06 22:13:14,516 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:13:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:15,812 INFO L93 Difference]: Finished difference Result 1076 states and 1646 transitions. [2019-11-06 22:13:15,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:15,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-11-06 22:13:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:15,822 INFO L225 Difference]: With dead ends: 1076 [2019-11-06 22:13:15,823 INFO L226 Difference]: Without dead ends: 884 [2019-11-06 22:13:15,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2019-11-06 22:13:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 882. [2019-11-06 22:13:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2019-11-06 22:13:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1323 transitions. [2019-11-06 22:13:15,870 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1323 transitions. Word has length 150 [2019-11-06 22:13:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:15,871 INFO L462 AbstractCegarLoop]: Abstraction has 882 states and 1323 transitions. [2019-11-06 22:13:15,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1323 transitions. [2019-11-06 22:13:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 22:13:15,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:15,875 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:15,875 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1175617460, now seen corresponding path program 1 times [2019-11-06 22:13:15,876 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:15,876 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538036727] [2019-11-06 22:13:15,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:16,466 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:16,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538036727] [2019-11-06 22:13:16,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:16,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:16,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178037019] [2019-11-06 22:13:16,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:16,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:16,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:16,518 INFO L87 Difference]: Start difference. First operand 882 states and 1323 transitions. Second operand 5 states. [2019-11-06 22:13:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:18,810 INFO L93 Difference]: Finished difference Result 2577 states and 3862 transitions. [2019-11-06 22:13:18,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:18,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-06 22:13:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:18,819 INFO L225 Difference]: With dead ends: 2577 [2019-11-06 22:13:18,820 INFO L226 Difference]: Without dead ends: 1708 [2019-11-06 22:13:18,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2019-11-06 22:13:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1706. [2019-11-06 22:13:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-11-06 22:13:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2536 transitions. [2019-11-06 22:13:18,904 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2536 transitions. Word has length 150 [2019-11-06 22:13:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:18,905 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2536 transitions. [2019-11-06 22:13:18,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2536 transitions. [2019-11-06 22:13:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:13:18,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:18,910 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:18,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash -522806920, now seen corresponding path program 1 times [2019-11-06 22:13:18,911 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:18,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930326377] [2019-11-06 22:13:18,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:19,215 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:19,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930326377] [2019-11-06 22:13:19,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:19,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:19,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100585102] [2019-11-06 22:13:19,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:19,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:19,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:19,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:19,269 INFO L87 Difference]: Start difference. First operand 1706 states and 2536 transitions. Second operand 4 states. [2019-11-06 22:13:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:21,817 INFO L93 Difference]: Finished difference Result 5072 states and 7538 transitions. [2019-11-06 22:13:21,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:21,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-11-06 22:13:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:21,834 INFO L225 Difference]: With dead ends: 5072 [2019-11-06 22:13:21,835 INFO L226 Difference]: Without dead ends: 3398 [2019-11-06 22:13:21,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2019-11-06 22:13:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1708. [2019-11-06 22:13:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1708 states. [2019-11-06 22:13:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2538 transitions. [2019-11-06 22:13:21,966 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2538 transitions. Word has length 151 [2019-11-06 22:13:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:21,967 INFO L462 AbstractCegarLoop]: Abstraction has 1708 states and 2538 transitions. [2019-11-06 22:13:21,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2538 transitions. [2019-11-06 22:13:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:13:21,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:21,971 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:21,971 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1124709406, now seen corresponding path program 1 times [2019-11-06 22:13:21,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:21,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346891678] [2019-11-06 22:13:21,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:22,260 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:22,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346891678] [2019-11-06 22:13:22,308 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:22,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:22,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039851034] [2019-11-06 22:13:22,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:22,309 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:22,310 INFO L87 Difference]: Start difference. First operand 1708 states and 2538 transitions. Second operand 4 states. [2019-11-06 22:13:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:24,569 INFO L93 Difference]: Finished difference Result 4838 states and 7205 transitions. [2019-11-06 22:13:24,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:24,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-06 22:13:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:24,585 INFO L225 Difference]: With dead ends: 4838 [2019-11-06 22:13:24,585 INFO L226 Difference]: Without dead ends: 3310 [2019-11-06 22:13:24,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2019-11-06 22:13:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 3308. [2019-11-06 22:13:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3308 states. [2019-11-06 22:13:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4871 transitions. [2019-11-06 22:13:24,731 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4871 transitions. Word has length 152 [2019-11-06 22:13:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:24,732 INFO L462 AbstractCegarLoop]: Abstraction has 3308 states and 4871 transitions. [2019-11-06 22:13:24,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4871 transitions. [2019-11-06 22:13:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:13:24,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:24,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:24,738 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -617278081, now seen corresponding path program 1 times [2019-11-06 22:13:24,739 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:24,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534009001] [2019-11-06 22:13:24,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:25,201 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:25,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534009001] [2019-11-06 22:13:25,306 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:25,306 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:25,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755742601] [2019-11-06 22:13:25,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:25,307 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:25,308 INFO L87 Difference]: Start difference. First operand 3308 states and 4871 transitions. Second operand 5 states. [2019-11-06 22:13:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:26,647 INFO L93 Difference]: Finished difference Result 5666 states and 8353 transitions. [2019-11-06 22:13:26,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:26,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2019-11-06 22:13:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:26,660 INFO L225 Difference]: With dead ends: 5666 [2019-11-06 22:13:26,660 INFO L226 Difference]: Without dead ends: 2528 [2019-11-06 22:13:26,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2019-11-06 22:13:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2528. [2019-11-06 22:13:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2528 states. [2019-11-06 22:13:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3707 transitions. [2019-11-06 22:13:26,785 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3707 transitions. Word has length 152 [2019-11-06 22:13:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:26,785 INFO L462 AbstractCegarLoop]: Abstraction has 2528 states and 3707 transitions. [2019-11-06 22:13:26,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3707 transitions. [2019-11-06 22:13:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:26,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:26,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:26,791 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 696225132, now seen corresponding path program 1 times [2019-11-06 22:13:26,792 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:26,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438802177] [2019-11-06 22:13:26,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:27,138 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:27,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438802177] [2019-11-06 22:13:27,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:27,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:27,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043060445] [2019-11-06 22:13:27,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:27,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:27,269 INFO L87 Difference]: Start difference. First operand 2528 states and 3707 transitions. Second operand 4 states. [2019-11-06 22:13:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:28,772 INFO L93 Difference]: Finished difference Result 6812 states and 10094 transitions. [2019-11-06 22:13:28,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:28,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-11-06 22:13:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:28,796 INFO L225 Difference]: With dead ends: 6812 [2019-11-06 22:13:28,796 INFO L226 Difference]: Without dead ends: 4696 [2019-11-06 22:13:28,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2019-11-06 22:13:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 4694. [2019-11-06 22:13:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4694 states. [2019-11-06 22:13:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 6887 transitions. [2019-11-06 22:13:29,114 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 6887 transitions. Word has length 158 [2019-11-06 22:13:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:29,115 INFO L462 AbstractCegarLoop]: Abstraction has 4694 states and 6887 transitions. [2019-11-06 22:13:29,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 6887 transitions. [2019-11-06 22:13:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:29,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:29,123 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:29,123 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1185599087, now seen corresponding path program 1 times [2019-11-06 22:13:29,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:29,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176148013] [2019-11-06 22:13:29,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:29,804 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:29,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176148013] [2019-11-06 22:13:29,954 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:29,954 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2019-11-06 22:13:29,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378439219] [2019-11-06 22:13:29,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:13:29,955 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:29,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:13:29,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:13:29,956 INFO L87 Difference]: Start difference. First operand 4694 states and 6887 transitions. Second operand 16 states. [2019-11-06 22:13:30,240 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2019-11-06 22:13:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:33,670 INFO L93 Difference]: Finished difference Result 12388 states and 19102 transitions. [2019-11-06 22:13:33,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:13:33,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 158 [2019-11-06 22:13:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:33,701 INFO L225 Difference]: With dead ends: 12388 [2019-11-06 22:13:33,702 INFO L226 Difference]: Without dead ends: 8416 [2019-11-06 22:13:33,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:13:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8416 states. [2019-11-06 22:13:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8416 to 6432. [2019-11-06 22:13:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6432 states. [2019-11-06 22:13:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 9844 transitions. [2019-11-06 22:13:34,010 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 9844 transitions. Word has length 158 [2019-11-06 22:13:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:34,011 INFO L462 AbstractCegarLoop]: Abstraction has 6432 states and 9844 transitions. [2019-11-06 22:13:34,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:13:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 9844 transitions. [2019-11-06 22:13:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:34,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:34,018 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:34,018 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash 11065959, now seen corresponding path program 1 times [2019-11-06 22:13:34,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:34,019 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160852668] [2019-11-06 22:13:34,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:34,425 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:34,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160852668] [2019-11-06 22:13:34,477 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:34,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 22:13:34,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654377692] [2019-11-06 22:13:34,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:13:34,478 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:13:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:13:34,478 INFO L87 Difference]: Start difference. First operand 6432 states and 9844 transitions. Second operand 10 states. [2019-11-06 22:13:34,714 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:13:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:36,248 INFO L93 Difference]: Finished difference Result 13818 states and 21476 transitions. [2019-11-06 22:13:36,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:13:36,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 158 [2019-11-06 22:13:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:36,273 INFO L225 Difference]: With dead ends: 13818 [2019-11-06 22:13:36,274 INFO L226 Difference]: Without dead ends: 9628 [2019-11-06 22:13:36,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:13:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9628 states. [2019-11-06 22:13:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9628 to 7796. [2019-11-06 22:13:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7796 states. [2019-11-06 22:13:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7796 states to 7796 states and 11622 transitions. [2019-11-06 22:13:36,745 INFO L78 Accepts]: Start accepts. Automaton has 7796 states and 11622 transitions. Word has length 158 [2019-11-06 22:13:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:36,747 INFO L462 AbstractCegarLoop]: Abstraction has 7796 states and 11622 transitions. [2019-11-06 22:13:36,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:13:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7796 states and 11622 transitions. [2019-11-06 22:13:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:36,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:36,760 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:36,761 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash -362607228, now seen corresponding path program 1 times [2019-11-06 22:13:36,761 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:36,761 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456624371] [2019-11-06 22:13:36,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:37,105 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:37,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456624371] [2019-11-06 22:13:37,164 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:37,165 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:13:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751983201] [2019-11-06 22:13:37,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:13:37,166 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:13:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:37,166 INFO L87 Difference]: Start difference. First operand 7796 states and 11622 transitions. Second operand 6 states. [2019-11-06 22:13:37,418 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-11-06 22:13:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:39,786 INFO L93 Difference]: Finished difference Result 16045 states and 25162 transitions. [2019-11-06 22:13:39,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:13:39,787 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-06 22:13:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:39,817 INFO L225 Difference]: With dead ends: 16045 [2019-11-06 22:13:39,818 INFO L226 Difference]: Without dead ends: 14207 [2019-11-06 22:13:39,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:13:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14207 states. [2019-11-06 22:13:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14207 to 10541. [2019-11-06 22:13:40,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10541 states. [2019-11-06 22:13:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 16098 transitions. [2019-11-06 22:13:40,450 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 16098 transitions. Word has length 158 [2019-11-06 22:13:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:40,451 INFO L462 AbstractCegarLoop]: Abstraction has 10541 states and 16098 transitions. [2019-11-06 22:13:40,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:13:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 16098 transitions. [2019-11-06 22:13:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:40,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:40,461 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:13:40,461 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1963094895, now seen corresponding path program 1 times [2019-11-06 22:13:40,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:40,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17938460] [2019-11-06 22:13:40,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:40,803 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:40,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17938460] [2019-11-06 22:13:40,843 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:40,843 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:40,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933083837] [2019-11-06 22:13:40,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:40,844 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:40,845 INFO L87 Difference]: Start difference. First operand 10541 states and 16098 transitions. Second operand 5 states.