/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:58:03,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:58:03,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:58:03,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:58:03,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:58:03,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:58:03,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:58:03,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:58:03,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:58:03,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:58:03,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:58:03,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:58:03,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:58:03,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:58:03,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:58:03,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:58:03,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:58:03,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:58:03,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:58:03,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:58:03,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:58:03,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:58:03,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:58:03,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:58:03,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:58:03,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:58:03,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:58:03,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:58:03,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 03:58:03,406 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:58:03,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:58:03,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:58:03,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:58:03,412 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:58:03,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:58:03,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:58:03,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:58:03,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:58:03,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:58:03,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:58:03,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:58:03,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:58:03,418 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:58:03,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:58:03,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:58:03,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:58:03,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:58:03,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:58:03,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:58:03,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:58:03,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:58:03,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:58:03,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:58:03,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:58:03,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:58:03,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:58:03,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:58:03,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:58:03,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:58:03,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:58:03,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:58:03,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:58:03,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:58:03,914 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:58:03,916 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 03:58:04,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1501d1cf4/a5e3460ba2974cf782c009a9e151ff12/FLAG860a4a502 [2020-07-20 03:58:04,695 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:58:04,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 03:58:04,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1501d1cf4/a5e3460ba2974cf782c009a9e151ff12/FLAG860a4a502 [2020-07-20 03:58:04,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1501d1cf4/a5e3460ba2974cf782c009a9e151ff12 [2020-07-20 03:58:04,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:58:04,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:58:04,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:04,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:58:04,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:58:04,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:04" (1/1) ... [2020-07-20 03:58:04,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a71cf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:04, skipping insertion in model container [2020-07-20 03:58:04,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:58:04" (1/1) ... [2020-07-20 03:58:04,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:58:05,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:58:05,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:05,345 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:58:05,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:58:05,586 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:58:05,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05 WrapperNode [2020-07-20 03:58:05,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:58:05,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:58:05,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:58:05,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:58:05,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... [2020-07-20 03:58:05,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:58:05,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:58:05,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:58:05,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:58:05,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:58:05,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:58:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:58:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:58:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-20 03:58:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:58:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-20 03:58:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:58:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:58:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-20 03:58:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-20 03:58:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:58:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 03:58:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 03:58:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:58:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:58:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:58:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:58:06,493 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:58:06,493 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 03:58:06,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:06 BoogieIcfgContainer [2020-07-20 03:58:06,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:58:06,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:58:06,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:58:06,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:58:06,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:58:04" (1/3) ... [2020-07-20 03:58:06,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8ecc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:06, skipping insertion in model container [2020-07-20 03:58:06,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:58:05" (2/3) ... [2020-07-20 03:58:06,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8ecc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:58:06, skipping insertion in model container [2020-07-20 03:58:06,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:58:06" (3/3) ... [2020-07-20 03:58:06,518 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-20 03:58:06,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:58:06,541 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:58:06,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:58:06,605 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:58:06,605 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:58:06,606 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:58:06,606 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:58:06,606 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:58:06,606 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:58:06,607 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:58:06,607 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:58:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-20 03:58:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 03:58:06,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:06,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:06,650 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-20 03:58:06,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:06,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535011866] [2020-07-20 03:58:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:07,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535011866] [2020-07-20 03:58:07,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:07,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:58:07,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172728556] [2020-07-20 03:58:07,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:58:07,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:07,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:58:07,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:58:07,079 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-20 03:58:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:07,556 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-07-20 03:58:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:58:07,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-20 03:58:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:07,578 INFO L225 Difference]: With dead ends: 127 [2020-07-20 03:58:07,579 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:58:07,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:58:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:58:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-07-20 03:58:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 03:58:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 03:58:07,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-20 03:58:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:07,668 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 03:58:07,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:58:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 03:58:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 03:58:07,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:07,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:07,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:58:07,671 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-20 03:58:07,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:07,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603433620] [2020-07-20 03:58:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:07,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603433620] [2020-07-20 03:58:07,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:07,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:58:07,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727655364] [2020-07-20 03:58:07,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:58:07,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:07,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:58:07,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:07,919 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-20 03:58:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:08,170 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 03:58:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:58:08,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 03:58:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:08,173 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:58:08,173 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 03:58:08,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 03:58:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-07-20 03:58:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:58:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 03:58:08,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-20 03:58:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:08,187 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 03:58:08,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:58:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 03:58:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 03:58:08,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:08,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:08,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:58:08,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-20 03:58:08,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:08,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789187674] [2020-07-20 03:58:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:58:08,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789187674] [2020-07-20 03:58:08,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:08,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:58:08,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785820721] [2020-07-20 03:58:08,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:58:08,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:58:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:58:08,345 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-07-20 03:58:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:08,584 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 03:58:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:58:08,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 03:58:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:08,586 INFO L225 Difference]: With dead ends: 48 [2020-07-20 03:58:08,587 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:58:08,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:58:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:58:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-07-20 03:58:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:58:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-20 03:58:08,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-07-20 03:58:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:08,602 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-20 03:58:08,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:58:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-20 03:58:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 03:58:08,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:08,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:08,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 03:58:08,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-07-20 03:58:08,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:08,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716145017] [2020-07-20 03:58:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 03:58:08,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716145017] [2020-07-20 03:58:08,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:58:08,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 03:58:08,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279988825] [2020-07-20 03:58:08,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 03:58:08,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:08,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 03:58:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 03:58:08,845 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-07-20 03:58:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:09,200 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 03:58:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:58:09,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 03:58:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:09,204 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:58:09,205 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 03:58:09,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 03:58:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 03:58:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:58:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 03:58:09,232 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-07-20 03:58:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:09,233 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 03:58:09,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 03:58:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 03:58:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 03:58:09,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:09,236 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:09,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 03:58:09,237 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:09,238 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-07-20 03:58:09,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:09,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762631722] [2020-07-20 03:58:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 03:58:09,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762631722] [2020-07-20 03:58:09,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4965172] [2020-07-20 03:58:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7189f070 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:09,604 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7189f070 issued 2 check-sat command(s) [2020-07-20 03:58:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 03:58:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:58:09,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:09,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 03:58:09,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853576815] [2020-07-20 03:58:09,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:09,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:09,693 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-07-20 03:58:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:09,936 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-20 03:58:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:58:09,937 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 03:58:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:09,941 INFO L225 Difference]: With dead ends: 66 [2020-07-20 03:58:09,942 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 03:58:09,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 03:58:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 03:58:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 03:58:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 03:58:09,954 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-07-20 03:58:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:09,955 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 03:58:09,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 03:58:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:58:09,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:09,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:10,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:10,172 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-07-20 03:58:10,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:10,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694824029] [2020-07-20 03:58:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:58:10,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694824029] [2020-07-20 03:58:10,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220888718] [2020-07-20 03:58:10,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786b96d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:10,474 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786b96d issued 2 check-sat command(s) [2020-07-20 03:58:10,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:58:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 03:58:10,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:10,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 03:58:10,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702582748] [2020-07-20 03:58:10,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:58:10,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:58:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:10,580 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-07-20 03:58:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:10,843 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-07-20 03:58:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:58:10,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 03:58:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:10,845 INFO L225 Difference]: With dead ends: 78 [2020-07-20 03:58:10,845 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:58:10,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:58:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:58:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 03:58:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:58:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-07-20 03:58:10,857 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-07-20 03:58:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:10,858 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-07-20 03:58:10,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:58:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-07-20 03:58:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 03:58:10,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:10,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:11,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:11,068 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-07-20 03:58:11,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:11,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64766557] [2020-07-20 03:58:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 03:58:11,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64766557] [2020-07-20 03:58:11,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18729181] [2020-07-20 03:58:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f57ddf1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:11,320 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f57ddf1 issued 2 check-sat command(s) [2020-07-20 03:58:11,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:11,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:58:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 03:58:11,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:11,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-20 03:58:11,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866116538] [2020-07-20 03:58:11,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:58:11,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:58:11,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:58:11,416 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 12 states. [2020-07-20 03:58:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:11,645 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-07-20 03:58:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:58:11,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-20 03:58:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:11,648 INFO L225 Difference]: With dead ends: 90 [2020-07-20 03:58:11,648 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 03:58:11,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:58:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 03:58:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-07-20 03:58:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 03:58:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-20 03:58:11,661 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-07-20 03:58:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:11,662 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-20 03:58:11,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:58:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-20 03:58:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 03:58:11,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:11,664 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:11,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:11,874 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-07-20 03:58:11,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:11,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707620974] [2020-07-20 03:58:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 03:58:12,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707620974] [2020-07-20 03:58:12,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391239586] [2020-07-20 03:58:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23668308 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:12,183 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23668308 issued 2 check-sat command(s) [2020-07-20 03:58:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 03:58:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-20 03:58:12,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:12,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-20 03:58:12,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514107548] [2020-07-20 03:58:12,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:58:12,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:58:12,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:58:12,312 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-07-20 03:58:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:12,570 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-07-20 03:58:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:58:12,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-20 03:58:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:12,579 INFO L225 Difference]: With dead ends: 102 [2020-07-20 03:58:12,582 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 03:58:12,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:58:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 03:58:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 03:58:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 03:58:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-07-20 03:58:12,619 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-07-20 03:58:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:12,620 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-07-20 03:58:12,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:58:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-07-20 03:58:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:58:12,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:12,627 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:12,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:12,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-07-20 03:58:12,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:12,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891670715] [2020-07-20 03:58:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 03:58:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891670715] [2020-07-20 03:58:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844533440] [2020-07-20 03:58:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63d013da No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:13,449 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63d013da issued 2 check-sat command(s) [2020-07-20 03:58:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:58:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 03:58:13,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:13,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-07-20 03:58:13,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269097599] [2020-07-20 03:58:13,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:58:13,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:58:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:58:13,607 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-07-20 03:58:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:13,890 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-07-20 03:58:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:58:13,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-07-20 03:58:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:13,893 INFO L225 Difference]: With dead ends: 114 [2020-07-20 03:58:13,896 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 03:58:13,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:58:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 03:58:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-20 03:58:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 03:58:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-20 03:58:13,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-07-20 03:58:13,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:13,927 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-20 03:58:13,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:58:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-20 03:58:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 03:58:13,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:13,929 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:14,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:14,144 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-07-20 03:58:14,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:14,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2821074] [2020-07-20 03:58:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 03:58:14,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2821074] [2020-07-20 03:58:14,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463603700] [2020-07-20 03:58:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10f8f310 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:14,611 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10f8f310 issued 3 check-sat command(s) [2020-07-20 03:58:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 03:58:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 03:58:14,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:14,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 03:58:14,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554173091] [2020-07-20 03:58:14,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:58:14,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:58:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:58:14,675 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-20 03:58:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:14,992 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-20 03:58:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:58:14,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 03:58:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:14,996 INFO L225 Difference]: With dead ends: 168 [2020-07-20 03:58:14,996 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 03:58:14,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:58:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 03:58:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-20 03:58:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 03:58:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-20 03:58:15,013 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-20 03:58:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:15,014 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-20 03:58:15,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:58:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-20 03:58:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 03:58:15,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:15,017 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:15,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:15,231 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-07-20 03:58:15,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:15,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926417300] [2020-07-20 03:58:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 03:58:15,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926417300] [2020-07-20 03:58:15,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426128724] [2020-07-20 03:58:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a6f7ea7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:17,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a6f7ea7 issued 4 check-sat command(s) [2020-07-20 03:58:17,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 03:58:17,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:17,195 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:58:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 03:58:17,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:17,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 03:58:17,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947477139] [2020-07-20 03:58:17,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:58:17,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:58:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:58:17,232 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2020-07-20 03:58:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:17,534 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-07-20 03:58:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:58:17,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-20 03:58:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:17,538 INFO L225 Difference]: With dead ends: 109 [2020-07-20 03:58:17,538 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 03:58:17,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:58:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 03:58:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-07-20 03:58:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 03:58:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-07-20 03:58:17,552 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-07-20 03:58:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:17,553 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-07-20 03:58:17,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:58:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-07-20 03:58:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 03:58:17,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:17,556 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:17,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:17,771 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-07-20 03:58:17,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:17,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139781506] [2020-07-20 03:58:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-07-20 03:58:17,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139781506] [2020-07-20 03:58:17,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309626873] [2020-07-20 03:58:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57f62f1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:19,250 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57f62f1e issued 3 check-sat command(s) [2020-07-20 03:58:19,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 03:58:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 297 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-20 03:58:19,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:19,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 03:58:19,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159008611] [2020-07-20 03:58:19,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:58:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:58:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:58:19,363 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 13 states. [2020-07-20 03:58:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:19,752 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-07-20 03:58:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:58:19,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-07-20 03:58:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:19,754 INFO L225 Difference]: With dead ends: 181 [2020-07-20 03:58:19,755 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 03:58:19,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:58:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 03:58:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-07-20 03:58:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 03:58:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-07-20 03:58:19,768 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 102 [2020-07-20 03:58:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:19,768 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-07-20 03:58:19,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:58:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-07-20 03:58:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 03:58:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:19,771 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:19,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:58:19,986 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 9 times [2020-07-20 03:58:19,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:19,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484274554] [2020-07-20 03:58:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 03:58:20,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484274554] [2020-07-20 03:58:20,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265393044] [2020-07-20 03:58:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b8ed2f4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:27,248 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b8ed2f4 issued 3 check-sat command(s) [2020-07-20 03:58:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:58:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 03:58:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:58:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 254 proven. 768 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 03:58:27,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:58:27,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-07-20 03:58:27,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73864014] [2020-07-20 03:58:27,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:58:27,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:58:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:58:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:58:27,428 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 16 states. [2020-07-20 03:58:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:58:27,927 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-07-20 03:58:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:58:27,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-07-20 03:58:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:58:27,930 INFO L225 Difference]: With dead ends: 212 [2020-07-20 03:58:27,930 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 03:58:27,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:58:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 03:58:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2020-07-20 03:58:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 03:58:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-07-20 03:58:27,945 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 135 [2020-07-20 03:58:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:58:27,946 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-07-20 03:58:27,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:58:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-07-20 03:58:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 03:58:27,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:58:27,949 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:58:28,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:58:28,158 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:58:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:58:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 10 times [2020-07-20 03:58:28,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:58:28,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233341483] [2020-07-20 03:58:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:58:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:58:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-20 03:58:28,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233341483] [2020-07-20 03:58:28,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312819457] [2020-07-20 03:58:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6496cb3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:59:16,602 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6496cb3 issued 3 check-sat command(s) [2020-07-20 03:59:16,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:59:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 03:59:16,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:59:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-20 03:59:16,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:59:16,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-07-20 03:59:16,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020573837] [2020-07-20 03:59:16,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:59:16,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:59:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:59:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:59:16,853 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 19 states. [2020-07-20 03:59:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:59:17,439 INFO L93 Difference]: Finished difference Result 243 states and 283 transitions. [2020-07-20 03:59:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:59:17,439 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 168 [2020-07-20 03:59:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:59:17,441 INFO L225 Difference]: With dead ends: 243 [2020-07-20 03:59:17,441 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 03:59:17,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:59:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 03:59:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-20 03:59:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 03:59:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-07-20 03:59:17,459 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 168 [2020-07-20 03:59:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:59:17,460 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-07-20 03:59:17,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:59:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-07-20 03:59:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 03:59:17,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:59:17,464 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 31, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:59:17,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:59:17,665 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:59:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:59:17,665 INFO L82 PathProgramCache]: Analyzing trace with hash 948653961, now seen corresponding path program 11 times [2020-07-20 03:59:17,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:59:17,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226058137] [2020-07-20 03:59:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@c3a0588 [2020-07-20 03:59:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:59:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-07-20 03:59:17,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226058137] [2020-07-20 03:59:17,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629119509] [2020-07-20 03:59:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49ead1f0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true