/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 BIGGEST_EQUIVALENCE_CLASS --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/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:07:43,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:07:43,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:07:43,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:07:43,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:07:43,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:07:43,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:07:43,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:07:43,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:07:43,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:07:43,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:07:43,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:07:43,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:07:43,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:07:43,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:07:43,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:07:43,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:07:43,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:07:43,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:07:43,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:07:43,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:07:43,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:07:43,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:07:43,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:07:43,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:07:43,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:07:43,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:07:43,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:07:43,200 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 06:07:43,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:07:43,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:07:43,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:07:43,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:07:43,217 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:07:43,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:07:43,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:07:43,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:07:43,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:07:43,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:07:43,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:07:43,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:07:43,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:07:43,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:07:43,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:07:43,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:07:43,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:07:43,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:07:43,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:07:43,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:07:43,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:07:43,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:07:43,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:07:43,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:07:43,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 06:07:43,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:07:43,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:07:43,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:07:43,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:07:43,615 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:07:43,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-20 06:07:43,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abce9ab14/b2f12bb35b6042fa97941f87b0a4196f/FLAG3c2831748 [2020-07-20 06:07:44,132 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:07:44,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-20 06:07:44,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abce9ab14/b2f12bb35b6042fa97941f87b0a4196f/FLAG3c2831748 [2020-07-20 06:07:44,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abce9ab14/b2f12bb35b6042fa97941f87b0a4196f [2020-07-20 06:07:44,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:07:44,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:07:44,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:07:44,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:07:44,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:07:44,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3849e20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44, skipping insertion in model container [2020-07-20 06:07:44,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:07:44,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:07:44,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:07:44,802 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:07:44,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:07:44,845 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:07:44,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44 WrapperNode [2020-07-20 06:07:44,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:07:44,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:07:44,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:07:44,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:07:44,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (1/1) ... [2020-07-20 06:07:44,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:07:44,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:07:44,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:07:44,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:07:44,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (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 06:07:45,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:07:45,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:07:45,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:07:45,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:07:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:07:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:07:45,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:07:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:07:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:07:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:07:45,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:07:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:07:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:07:45,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:07:45,265 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:07:45,265 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 06:07:45,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:07:45 BoogieIcfgContainer [2020-07-20 06:07:45,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:07:45,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:07:45,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:07:45,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:07:45,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:07:44" (1/3) ... [2020-07-20 06:07:45,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fdb735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:07:45, skipping insertion in model container [2020-07-20 06:07:45,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:07:44" (2/3) ... [2020-07-20 06:07:45,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fdb735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:07:45, skipping insertion in model container [2020-07-20 06:07:45,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:07:45" (3/3) ... [2020-07-20 06:07:45,278 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-20 06:07:45,289 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:07:45,296 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:07:45,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:07:45,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:07:45,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:07:45,337 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:07:45,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:07:45,337 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:07:45,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:07:45,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:07:45,338 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:07:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 06:07:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:07:45,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:45,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:45,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-07-20 06:07:45,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:45,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337992313] [2020-07-20 06:07:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:45,558 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 06:07:45,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337992313] [2020-07-20 06:07:45,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:45,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:07:45,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856320498] [2020-07-20 06:07:45,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:07:45,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:45,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:07:45,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:07:45,590 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-20 06:07:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:45,695 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-20 06:07:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:07:45,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 06:07:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:45,708 INFO L225 Difference]: With dead ends: 42 [2020-07-20 06:07:45,708 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 06:07:45,712 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 06:07:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 06:07:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 06:07:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 06:07:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-20 06:07:45,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-07-20 06:07:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:45,763 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-20 06:07:45,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:07:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-20 06:07:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 06:07:45,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:45,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:45,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:07:45,766 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:45,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-07-20 06:07:45,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:45,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636801586] [2020-07-20 06:07:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:45,869 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 06:07:45,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636801586] [2020-07-20 06:07:45,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:45,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:07:45,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338639393] [2020-07-20 06:07:45,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:07:45,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:07:45,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:45,878 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-07-20 06:07:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:45,956 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 06:07:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:07:45,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 06:07:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:45,960 INFO L225 Difference]: With dead ends: 35 [2020-07-20 06:07:45,960 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 06:07:45,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:07:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 06:07:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-20 06:07:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 06:07:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-20 06:07:45,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-07-20 06:07:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:45,972 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-20 06:07:45,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:07:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-20 06:07:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 06:07:45,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:45,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:45,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:07:45,974 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:45,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-07-20 06:07:45,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:45,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048072156] [2020-07-20 06:07:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:46,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048072156] [2020-07-20 06:07:46,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917523389] [2020-07-20 06:07:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a38aa50 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 06:07:46,129 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5a38aa50 issued 2 check-sat command(s) [2020-07-20 06:07:46,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:07:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:46,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:46,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 06:07:46,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006862438] [2020-07-20 06:07:46,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:07:46,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:07:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:07:46,220 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-07-20 06:07:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:46,313 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-07-20 06:07:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:07:46,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 06:07:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:46,316 INFO L225 Difference]: With dead ends: 45 [2020-07-20 06:07:46,316 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 06:07:46,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:07:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 06:07:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 06:07:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 06:07:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 06:07:46,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-20 06:07:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:46,326 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 06:07:46,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:07:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 06:07:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 06:07:46,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:46,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:46,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 06:07:46,542 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-07-20 06:07:46,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:46,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924501220] [2020-07-20 06:07:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:46,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924501220] [2020-07-20 06:07:46,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645484427] [2020-07-20 06:07:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39f0ab3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:46,757 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39f0ab3 issued 2 check-sat command(s) [2020-07-20 06:07:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:07:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:46,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:46,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 06:07:46,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539294282] [2020-07-20 06:07:46,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:07:46,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:46,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:07:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:07:46,800 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-07-20 06:07:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:46,916 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-07-20 06:07:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:07:46,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 06:07:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:46,918 INFO L225 Difference]: With dead ends: 56 [2020-07-20 06:07:46,918 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 06:07:46,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:07:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 06:07:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-20 06:07:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 06:07:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 06:07:46,926 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-07-20 06:07:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:46,927 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 06:07:46,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:07:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 06:07:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 06:07:46,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:46,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:47,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:47,142 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-07-20 06:07:47,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:47,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425768341] [2020-07-20 06:07:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:47,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425768341] [2020-07-20 06:07:47,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896546065] [2020-07-20 06:07:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2762909f 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 06:07:47,267 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2762909f issued 3 check-sat command(s) [2020-07-20 06:07:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 06:07:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:07:47,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:47,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 06:07:47,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878321647] [2020-07-20 06:07:47,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:07:47,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:07:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:07:47,291 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 8 states. [2020-07-20 06:07:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:47,402 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-20 06:07:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:07:47,402 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-07-20 06:07:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:47,403 INFO L225 Difference]: With dead ends: 67 [2020-07-20 06:07:47,404 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 06:07:47,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:07:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 06:07:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 06:07:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 06:07:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 06:07:47,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-07-20 06:07:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:47,413 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 06:07:47,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:07:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 06:07:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 06:07:47,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:47,414 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:47,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:47,630 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-07-20 06:07:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:47,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964372680] [2020-07-20 06:07:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 06:07:47,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964372680] [2020-07-20 06:07:47,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:07:47,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 06:07:47,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446506206] [2020-07-20 06:07:47,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:07:47,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:47,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:07:47,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:07:47,714 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-07-20 06:07:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:47,813 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 06:07:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:07:47,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-20 06:07:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:47,816 INFO L225 Difference]: With dead ends: 45 [2020-07-20 06:07:47,816 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 06:07:47,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:07:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 06:07:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 06:07:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 06:07:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 06:07:47,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-07-20 06:07:47,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:47,825 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 06:07:47,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:07:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 06:07:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 06:07:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:47,826 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:47,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 06:07:47,827 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-07-20 06:07:47,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:47,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898470422] [2020-07-20 06:07:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:47,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898470422] [2020-07-20 06:07:47,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78736401] [2020-07-20 06:07:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@790c9c43 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 06:07:47,944 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@790c9c43 issued 2 check-sat command(s) [2020-07-20 06:07:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:07:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:47,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:47,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 06:07:47,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942441006] [2020-07-20 06:07:47,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:07:47,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:07:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:07:47,968 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2020-07-20 06:07:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:48,100 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-07-20 06:07:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:07:48,100 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 06:07:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:48,102 INFO L225 Difference]: With dead ends: 77 [2020-07-20 06:07:48,102 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 06:07:48,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:07:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 06:07:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-07-20 06:07:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 06:07:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-20 06:07:48,110 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-07-20 06:07:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:48,111 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-20 06:07:48,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:07:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-20 06:07:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 06:07:48,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:48,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:48,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:48,326 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-07-20 06:07:48,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:48,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026708178] [2020-07-20 06:07:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:48,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026708178] [2020-07-20 06:07:48,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146667201] [2020-07-20 06:07:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bd115cd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:48,488 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bd115cd issued 3 check-sat command(s) [2020-07-20 06:07:48,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:48,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:07:48,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:48,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:48,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 06:07:48,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72240490] [2020-07-20 06:07:48,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:07:48,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:07:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:07:48,533 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 10 states. [2020-07-20 06:07:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:48,650 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-07-20 06:07:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:07:48,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 06:07:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:48,652 INFO L225 Difference]: With dead ends: 88 [2020-07-20 06:07:48,652 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 06:07:48,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:07:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 06:07:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-07-20 06:07:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 06:07:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-20 06:07:48,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-07-20 06:07:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:48,661 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-20 06:07:48,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:07:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-20 06:07:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 06:07:48,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:48,662 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:48,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:48,878 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-07-20 06:07:48,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:48,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833130214] [2020-07-20 06:07:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:48,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833130214] [2020-07-20 06:07:48,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313941750] [2020-07-20 06:07:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f46f891 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 06:07:49,061 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f46f891 issued 3 check-sat command(s) [2020-07-20 06:07:49,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 06:07:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:49,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:49,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-20 06:07:49,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395578298] [2020-07-20 06:07:49,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:07:49,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:49,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:07:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:07:49,090 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-07-20 06:07:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:49,210 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-07-20 06:07:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:07:49,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 06:07:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:49,211 INFO L225 Difference]: With dead ends: 99 [2020-07-20 06:07:49,211 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 06:07:49,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:07:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 06:07:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-07-20 06:07:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 06:07:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-07-20 06:07:49,219 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-07-20 06:07:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:49,220 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-07-20 06:07:49,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:07:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-07-20 06:07:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 06:07:49,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:49,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:49,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:49,435 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:49,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:49,436 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-07-20 06:07:49,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:49,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302200203] [2020-07-20 06:07:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:49,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302200203] [2020-07-20 06:07:49,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682969394] [2020-07-20 06:07:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573c501d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:49,652 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@573c501d issued 3 check-sat command(s) [2020-07-20 06:07:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:07:49,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:49,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:49,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-20 06:07:49,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316864230] [2020-07-20 06:07:49,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 06:07:49,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:49,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 06:07:49,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:07:49,678 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 12 states. [2020-07-20 06:07:49,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:49,831 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-07-20 06:07:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:07:49,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-20 06:07:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:49,833 INFO L225 Difference]: With dead ends: 110 [2020-07-20 06:07:49,833 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 06:07:49,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:07:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 06:07:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-07-20 06:07:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 06:07:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-07-20 06:07:49,843 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-07-20 06:07:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:49,844 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-07-20 06:07:49,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 06:07:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-07-20 06:07:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 06:07:49,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:49,845 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:50,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 06:07:50,055 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-07-20 06:07:50,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:50,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746630522] [2020-07-20 06:07:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:50,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746630522] [2020-07-20 06:07:50,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635262913] [2020-07-20 06:07:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48dd319c 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 06:07:50,322 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48dd319c issued 3 check-sat command(s) [2020-07-20 06:07:50,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 06:07:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:50,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:50,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-20 06:07:50,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491806680] [2020-07-20 06:07:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 06:07:50,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 06:07:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:07:50,351 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 13 states. [2020-07-20 06:07:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:50,481 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-07-20 06:07:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 06:07:50,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-20 06:07:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:50,483 INFO L225 Difference]: With dead ends: 121 [2020-07-20 06:07:50,483 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 06:07:50,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:07:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 06:07:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-07-20 06:07:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 06:07:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-07-20 06:07:50,493 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-07-20 06:07:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:50,494 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-07-20 06:07:50,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 06:07:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-07-20 06:07:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 06:07:50,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:50,495 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:50,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 06:07:50,700 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-07-20 06:07:50,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:50,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410857816] [2020-07-20 06:07:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:50,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410857816] [2020-07-20 06:07:50,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123650179] [2020-07-20 06:07:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b53baa5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:50,940 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b53baa5 issued 3 check-sat command(s) [2020-07-20 06:07:50,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:07:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:50,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:50,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-20 06:07:50,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136073146] [2020-07-20 06:07:50,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:07:50,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:50,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:07:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:07:50,970 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 14 states. [2020-07-20 06:07:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:51,124 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-07-20 06:07:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:07:51,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-20 06:07:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:51,126 INFO L225 Difference]: With dead ends: 132 [2020-07-20 06:07:51,126 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 06:07:51,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:07:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 06:07:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-07-20 06:07:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 06:07:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-07-20 06:07:51,134 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-07-20 06:07:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:51,135 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-07-20 06:07:51,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:07:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-07-20 06:07:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 06:07:51,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:51,136 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:51,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:51,350 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-07-20 06:07:51,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:51,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984682956] [2020-07-20 06:07:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:51,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984682956] [2020-07-20 06:07:51,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619749586] [2020-07-20 06:07:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e168f15 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 06:07:51,591 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e168f15 issued 3 check-sat command(s) [2020-07-20 06:07:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 06:07:51,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:51,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:51,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-20 06:07:51,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795142633] [2020-07-20 06:07:51,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 06:07:51,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 06:07:51,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:07:51,623 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 15 states. [2020-07-20 06:07:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:51,799 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-07-20 06:07:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 06:07:51,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-20 06:07:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:51,805 INFO L225 Difference]: With dead ends: 143 [2020-07-20 06:07:51,805 INFO L226 Difference]: Without dead ends: 94 [2020-07-20 06:07:51,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:07:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-20 06:07:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-07-20 06:07:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 06:07:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-07-20 06:07:51,812 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-07-20 06:07:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:51,812 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-07-20 06:07:51,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 06:07:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-07-20 06:07:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 06:07:51,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:51,814 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:52,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:52,027 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-07-20 06:07:52,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:52,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990253136] [2020-07-20 06:07:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:52,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990253136] [2020-07-20 06:07:52,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914799865] [2020-07-20 06:07:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@518c5718 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:52,293 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@518c5718 issued 3 check-sat command(s) [2020-07-20 06:07:52,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 06:07:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:52,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:52,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-20 06:07:52,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626549420] [2020-07-20 06:07:52,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 06:07:52,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:52,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 06:07:52,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:07:52,322 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 16 states. [2020-07-20 06:07:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:52,517 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-07-20 06:07:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 06:07:52,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-20 06:07:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:52,519 INFO L225 Difference]: With dead ends: 154 [2020-07-20 06:07:52,519 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 06:07:52,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:07:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 06:07:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-07-20 06:07:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 06:07:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-07-20 06:07:52,526 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-07-20 06:07:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:52,526 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-07-20 06:07:52,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 06:07:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-07-20 06:07:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 06:07:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:52,528 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:52,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 06:07:52,729 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-07-20 06:07:52,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:52,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29872247] [2020-07-20 06:07:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-20 06:07:52,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29872247] [2020-07-20 06:07:52,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945650258] [2020-07-20 06:07:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@644459c7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:53,001 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@644459c7 issued 3 check-sat command(s) [2020-07-20 06:07:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 06:07:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:07:53,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:53,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15] total 19 [2020-07-20 06:07:53,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598629309] [2020-07-20 06:07:53,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 06:07:53,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 06:07:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:07:53,186 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 19 states. [2020-07-20 06:07:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:53,423 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-07-20 06:07:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 06:07:53,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-07-20 06:07:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:53,425 INFO L225 Difference]: With dead ends: 167 [2020-07-20 06:07:53,425 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 06:07:53,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:07:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 06:07:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-20 06:07:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 06:07:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-07-20 06:07:53,437 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 42 [2020-07-20 06:07:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:53,438 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-07-20 06:07:53,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 06:07:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-07-20 06:07:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 06:07:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:53,445 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:53,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 06:07:53,646 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash 961768194, now seen corresponding path program 10 times [2020-07-20 06:07:53,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:53,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648129862] [2020-07-20 06:07:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:53,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648129862] [2020-07-20 06:07:53,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103732407] [2020-07-20 06:07:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@62b8c8be No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:54,098 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@62b8c8be issued 2 check-sat command(s) [2020-07-20 06:07:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 06:07:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:54,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:54,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-20 06:07:54,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214977712] [2020-07-20 06:07:54,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 06:07:54,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 06:07:54,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:07:54,157 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 18 states. [2020-07-20 06:07:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:54,324 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2020-07-20 06:07:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 06:07:54,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-07-20 06:07:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:54,325 INFO L225 Difference]: With dead ends: 164 [2020-07-20 06:07:54,326 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 06:07:54,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 06:07:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 06:07:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2020-07-20 06:07:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 06:07:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-07-20 06:07:54,335 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-07-20 06:07:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:54,337 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-07-20 06:07:54,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 06:07:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-07-20 06:07:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 06:07:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:54,340 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:54,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 06:07:54,553 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash -662493340, now seen corresponding path program 11 times [2020-07-20 06:07:54,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:54,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093794481] [2020-07-20 06:07:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:54,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093794481] [2020-07-20 06:07:54,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316497381] [2020-07-20 06:07:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19ce6c0f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:54,958 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19ce6c0f issued 2 check-sat command(s) [2020-07-20 06:07:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 06:07:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:54,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:54,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-20 06:07:54,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219934638] [2020-07-20 06:07:54,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 06:07:54,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 06:07:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:07:54,997 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 19 states. [2020-07-20 06:07:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:55,160 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-07-20 06:07:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 06:07:55,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-20 06:07:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:55,162 INFO L225 Difference]: With dead ends: 175 [2020-07-20 06:07:55,162 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 06:07:55,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:07:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 06:07:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-07-20 06:07:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 06:07:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-07-20 06:07:55,168 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2020-07-20 06:07:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:55,168 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-07-20 06:07:55,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 06:07:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-07-20 06:07:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 06:07:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:55,169 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:55,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:55,384 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1790268230, now seen corresponding path program 12 times [2020-07-20 06:07:55,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:55,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712978702] [2020-07-20 06:07:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:55,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712978702] [2020-07-20 06:07:55,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652116179] [2020-07-20 06:07:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b9bbbdb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:56,005 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b9bbbdb issued 2 check-sat command(s) [2020-07-20 06:07:56,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 06:07:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:56,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:56,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-20 06:07:56,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109967270] [2020-07-20 06:07:56,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 06:07:56,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 06:07:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 06:07:56,063 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 20 states. [2020-07-20 06:07:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:56,246 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-07-20 06:07:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 06:07:56,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2020-07-20 06:07:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:56,248 INFO L225 Difference]: With dead ends: 186 [2020-07-20 06:07:56,248 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 06:07:56,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 06:07:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 06:07:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-07-20 06:07:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 06:07:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2020-07-20 06:07:56,254 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 96 [2020-07-20 06:07:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:56,254 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2020-07-20 06:07:56,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 06:07:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2020-07-20 06:07:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-20 06:07:56,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:56,256 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:56,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 06:07:56,468 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 957091496, now seen corresponding path program 13 times [2020-07-20 06:07:56,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:56,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639852200] [2020-07-20 06:07:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:56,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639852200] [2020-07-20 06:07:56,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529317050] [2020-07-20 06:07:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29cc70bf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:57,459 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@29cc70bf issued 2 check-sat command(s) [2020-07-20 06:07:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 06:07:57,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:57,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:57,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-20 06:07:57,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603199377] [2020-07-20 06:07:57,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 06:07:57,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 06:07:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:07:57,501 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand 21 states. [2020-07-20 06:07:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:57,702 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2020-07-20 06:07:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 06:07:57,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-07-20 06:07:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:57,704 INFO L225 Difference]: With dead ends: 197 [2020-07-20 06:07:57,704 INFO L226 Difference]: Without dead ends: 124 [2020-07-20 06:07:57,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:07:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-20 06:07:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2020-07-20 06:07:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 06:07:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-07-20 06:07:57,709 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 98 [2020-07-20 06:07:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:57,709 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-07-20 06:07:57,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 06:07:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-07-20 06:07:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 06:07:57,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:57,711 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:57,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:57,924 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:57,925 INFO L82 PathProgramCache]: Analyzing trace with hash -861832822, now seen corresponding path program 14 times [2020-07-20 06:07:57,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:57,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275662807] [2020-07-20 06:07:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:07:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:58,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275662807] [2020-07-20 06:07:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864672071] [2020-07-20 06:07:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a88ecfd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:59,757 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a88ecfd issued 3 check-sat command(s) [2020-07-20 06:07:59,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 06:07:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:07:59,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:59,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-20 06:07:59,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335365560] [2020-07-20 06:07:59,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 06:07:59,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 06:07:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 06:07:59,805 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 22 states. [2020-07-20 06:08:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:00,038 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-07-20 06:08:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 06:08:00,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-07-20 06:08:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:00,040 INFO L225 Difference]: With dead ends: 208 [2020-07-20 06:08:00,040 INFO L226 Difference]: Without dead ends: 131 [2020-07-20 06:08:00,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 06:08:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-20 06:08:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-07-20 06:08:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 06:08:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2020-07-20 06:08:00,049 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 100 [2020-07-20 06:08:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:00,049 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2020-07-20 06:08:00,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 06:08:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2020-07-20 06:08:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 06:08:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:00,051 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:00,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:00,261 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash -796412948, now seen corresponding path program 15 times [2020-07-20 06:08:00,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:00,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393534490] [2020-07-20 06:08:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:00,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393534490] [2020-07-20 06:08:00,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397074145] [2020-07-20 06:08:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6868a8d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:02,075 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6868a8d6 issued 3 check-sat command(s) [2020-07-20 06:08:02,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 06:08:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:02,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:02,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-20 06:08:02,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404267929] [2020-07-20 06:08:02,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 06:08:02,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 06:08:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 06:08:02,125 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand 23 states. [2020-07-20 06:08:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:02,369 INFO L93 Difference]: Finished difference Result 219 states and 235 transitions. [2020-07-20 06:08:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 06:08:02,369 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-07-20 06:08:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:02,371 INFO L225 Difference]: With dead ends: 219 [2020-07-20 06:08:02,371 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 06:08:02,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 06:08:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 06:08:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2020-07-20 06:08:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 06:08:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-07-20 06:08:02,377 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 102 [2020-07-20 06:08:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:02,377 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-07-20 06:08:02,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 06:08:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-07-20 06:08:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 06:08:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:02,379 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:02,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 06:08:02,592 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1942543822, now seen corresponding path program 16 times [2020-07-20 06:08:02,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:02,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576958420] [2020-07-20 06:08:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:02,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576958420] [2020-07-20 06:08:02,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647520481] [2020-07-20 06:08:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47e580d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:05,031 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@47e580d9 issued 3 check-sat command(s) [2020-07-20 06:08:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 06:08:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:05,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:05,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-20 06:08:05,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057584725] [2020-07-20 06:08:05,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 06:08:05,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 06:08:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:08:05,073 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 24 states. [2020-07-20 06:08:05,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:05,341 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-07-20 06:08:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 06:08:05,344 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-07-20 06:08:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:05,345 INFO L225 Difference]: With dead ends: 230 [2020-07-20 06:08:05,345 INFO L226 Difference]: Without dead ends: 145 [2020-07-20 06:08:05,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:08:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-20 06:08:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-07-20 06:08:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 06:08:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-07-20 06:08:05,351 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 104 [2020-07-20 06:08:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:05,351 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-07-20 06:08:05,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 06:08:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-07-20 06:08:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 06:08:05,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:05,352 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:05,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:05,563 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1265047344, now seen corresponding path program 17 times [2020-07-20 06:08:05,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:05,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46923694] [2020-07-20 06:08:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:05,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46923694] [2020-07-20 06:08:05,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695685305] [2020-07-20 06:08:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a3a214f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:07,446 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a3a214f issued 3 check-sat command(s) [2020-07-20 06:08:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 06:08:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:07,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:07,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-07-20 06:08:07,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065461334] [2020-07-20 06:08:07,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 06:08:07,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 06:08:07,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-20 06:08:07,485 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 25 states. [2020-07-20 06:08:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:07,743 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2020-07-20 06:08:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 06:08:07,744 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-07-20 06:08:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:07,746 INFO L225 Difference]: With dead ends: 241 [2020-07-20 06:08:07,747 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 06:08:07,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-20 06:08:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 06:08:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2020-07-20 06:08:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 06:08:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-07-20 06:08:07,754 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 106 [2020-07-20 06:08:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:07,754 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-07-20 06:08:07,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 06:08:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-07-20 06:08:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 06:08:07,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:07,756 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:07,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 06:08:07,969 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1269006318, now seen corresponding path program 18 times [2020-07-20 06:08:07,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:07,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328837946] [2020-07-20 06:08:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:08,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328837946] [2020-07-20 06:08:08,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912197190] [2020-07-20 06:08:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f2b5da3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:09,963 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f2b5da3 issued 3 check-sat command(s) [2020-07-20 06:08:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:09,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 06:08:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:10,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:10,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-07-20 06:08:10,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412466095] [2020-07-20 06:08:10,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 06:08:10,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 06:08:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-20 06:08:10,001 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 26 states. [2020-07-20 06:08:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:10,254 INFO L93 Difference]: Finished difference Result 252 states and 274 transitions. [2020-07-20 06:08:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 06:08:10,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-07-20 06:08:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:10,256 INFO L225 Difference]: With dead ends: 252 [2020-07-20 06:08:10,256 INFO L226 Difference]: Without dead ends: 159 [2020-07-20 06:08:10,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-20 06:08:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-20 06:08:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-07-20 06:08:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 06:08:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2020-07-20 06:08:10,262 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 108 [2020-07-20 06:08:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:10,262 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2020-07-20 06:08:10,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 06:08:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2020-07-20 06:08:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-07-20 06:08:10,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:10,264 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:10,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 06:08:10,465 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1248118668, now seen corresponding path program 19 times [2020-07-20 06:08:10,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:10,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174231691] [2020-07-20 06:08:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:10,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174231691] [2020-07-20 06:08:10,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514606742] [2020-07-20 06:08:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@226e8bb9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:13,073 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@226e8bb9 issued 3 check-sat command(s) [2020-07-20 06:08:13,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 06:08:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:13,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:13,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-07-20 06:08:13,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4434985] [2020-07-20 06:08:13,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 06:08:13,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 06:08:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-20 06:08:13,126 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand 27 states. [2020-07-20 06:08:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:13,442 INFO L93 Difference]: Finished difference Result 263 states and 287 transitions. [2020-07-20 06:08:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 06:08:13,443 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-07-20 06:08:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:13,444 INFO L225 Difference]: With dead ends: 263 [2020-07-20 06:08:13,444 INFO L226 Difference]: Without dead ends: 166 [2020-07-20 06:08:13,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-20 06:08:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-20 06:08:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2020-07-20 06:08:13,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-20 06:08:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2020-07-20 06:08:13,452 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 110 [2020-07-20 06:08:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:13,452 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2020-07-20 06:08:13,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 06:08:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2020-07-20 06:08:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-20 06:08:13,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:13,454 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:13,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:13,655 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:13,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1645043798, now seen corresponding path program 20 times [2020-07-20 06:08:13,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:13,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879892424] [2020-07-20 06:08:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:14,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879892424] [2020-07-20 06:08:14,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111815842] [2020-07-20 06:08:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@825b522 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:16,373 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@825b522 issued 3 check-sat command(s) [2020-07-20 06:08:16,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 06:08:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:16,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:16,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-07-20 06:08:16,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843085758] [2020-07-20 06:08:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 06:08:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 06:08:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-20 06:08:16,426 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand 28 states. [2020-07-20 06:08:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:16,756 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-07-20 06:08:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 06:08:16,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-07-20 06:08:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:16,758 INFO L225 Difference]: With dead ends: 274 [2020-07-20 06:08:16,758 INFO L226 Difference]: Without dead ends: 173 [2020-07-20 06:08:16,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-20 06:08:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-20 06:08:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2020-07-20 06:08:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 06:08:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-07-20 06:08:16,763 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 112 [2020-07-20 06:08:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:16,764 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-07-20 06:08:16,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 06:08:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-07-20 06:08:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 06:08:16,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:16,765 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:16,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-20 06:08:16,970 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1164634184, now seen corresponding path program 21 times [2020-07-20 06:08:16,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:16,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602756367] [2020-07-20 06:08:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:17,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602756367] [2020-07-20 06:08:17,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219454333] [2020-07-20 06:08:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7655d8b0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:20,543 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7655d8b0 issued 3 check-sat command(s) [2020-07-20 06:08:20,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 06:08:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:20,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:20,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-07-20 06:08:20,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172813423] [2020-07-20 06:08:20,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 06:08:20,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 06:08:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-20 06:08:20,586 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 29 states. [2020-07-20 06:08:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:20,944 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2020-07-20 06:08:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 06:08:20,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2020-07-20 06:08:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:20,947 INFO L225 Difference]: With dead ends: 285 [2020-07-20 06:08:20,947 INFO L226 Difference]: Without dead ends: 180 [2020-07-20 06:08:20,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-20 06:08:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-07-20 06:08:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2020-07-20 06:08:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 06:08:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2020-07-20 06:08:20,954 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 114 [2020-07-20 06:08:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:20,954 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2020-07-20 06:08:20,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 06:08:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2020-07-20 06:08:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-20 06:08:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:20,956 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:21,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:21,161 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash 269254298, now seen corresponding path program 22 times [2020-07-20 06:08:21,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:21,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219239888] [2020-07-20 06:08:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:21,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219239888] [2020-07-20 06:08:21,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912821318] [2020-07-20 06:08:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c0f29d6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:28,715 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c0f29d6 issued 3 check-sat command(s) [2020-07-20 06:08:28,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 06:08:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:28,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:28,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-07-20 06:08:28,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541797402] [2020-07-20 06:08:28,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 06:08:28,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 06:08:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-20 06:08:28,787 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand 30 states. [2020-07-20 06:08:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:29,167 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2020-07-20 06:08:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 06:08:29,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-07-20 06:08:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:29,169 INFO L225 Difference]: With dead ends: 296 [2020-07-20 06:08:29,170 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 06:08:29,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-20 06:08:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 06:08:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 172. [2020-07-20 06:08:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-20 06:08:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2020-07-20 06:08:29,176 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 116 [2020-07-20 06:08:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:29,176 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2020-07-20 06:08:29,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 06:08:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2020-07-20 06:08:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-20 06:08:29,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:29,177 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:29,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-20 06:08:29,389 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:29,389 INFO L82 PathProgramCache]: Analyzing trace with hash -448416516, now seen corresponding path program 23 times [2020-07-20 06:08:29,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:29,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132954865] [2020-07-20 06:08:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:29,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132954865] [2020-07-20 06:08:29,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740802963] [2020-07-20 06:08:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e61024 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:36,176 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e61024 issued 3 check-sat command(s) [2020-07-20 06:08:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 06:08:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:36,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:36,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-07-20 06:08:36,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695506693] [2020-07-20 06:08:36,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 06:08:36,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 06:08:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-20 06:08:36,238 INFO L87 Difference]: Start difference. First operand 172 states and 187 transitions. Second operand 31 states. [2020-07-20 06:08:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:36,632 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-07-20 06:08:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 06:08:36,634 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2020-07-20 06:08:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:36,636 INFO L225 Difference]: With dead ends: 307 [2020-07-20 06:08:36,636 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 06:08:36,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-20 06:08:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 06:08:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2020-07-20 06:08:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-20 06:08:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2020-07-20 06:08:36,643 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 118 [2020-07-20 06:08:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:36,643 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2020-07-20 06:08:36,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 06:08:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2020-07-20 06:08:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-20 06:08:36,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:36,644 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:36,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-20 06:08:36,857 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1359665886, now seen corresponding path program 24 times [2020-07-20 06:08:36,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:36,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417827514] [2020-07-20 06:08:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:37,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417827514] [2020-07-20 06:08:37,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60216811] [2020-07-20 06:08:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a452b16 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:43,231 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a452b16 issued 3 check-sat command(s) [2020-07-20 06:08:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:08:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 06:08:43,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:08:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:43,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:08:43,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2020-07-20 06:08:43,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201162067] [2020-07-20 06:08:43,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 06:08:43,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:08:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 06:08:43,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-20 06:08:43,302 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 32 states. [2020-07-20 06:08:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:08:43,712 INFO L93 Difference]: Finished difference Result 318 states and 352 transitions. [2020-07-20 06:08:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 06:08:43,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-07-20 06:08:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:08:43,714 INFO L225 Difference]: With dead ends: 318 [2020-07-20 06:08:43,714 INFO L226 Difference]: Without dead ends: 201 [2020-07-20 06:08:43,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-20 06:08:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-20 06:08:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2020-07-20 06:08:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-20 06:08:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 201 transitions. [2020-07-20 06:08:43,722 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 201 transitions. Word has length 120 [2020-07-20 06:08:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:08:43,723 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 201 transitions. [2020-07-20 06:08:43,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 06:08:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 201 transitions. [2020-07-20 06:08:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 06:08:43,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:08:43,724 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:08:43,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:08:43,940 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:08:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:08:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -534900672, now seen corresponding path program 25 times [2020-07-20 06:08:43,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:08:43,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888084921] [2020-07-20 06:08:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:08:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:08:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:08:44,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888084921] [2020-07-20 06:08:44,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327527825] [2020-07-20 06:08:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bcf8cc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:03,981 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bcf8cc issued 3 check-sat command(s) [2020-07-20 06:09:03,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:09:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 06:09:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:09:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:04,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:09:04,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-07-20 06:09:04,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178149943] [2020-07-20 06:09:04,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 06:09:04,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:09:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 06:09:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:09:04,207 INFO L87 Difference]: Start difference. First operand 184 states and 201 transitions. Second operand 33 states. [2020-07-20 06:09:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:09:04,615 INFO L93 Difference]: Finished difference Result 329 states and 365 transitions. [2020-07-20 06:09:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 06:09:04,616 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-07-20 06:09:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:09:04,617 INFO L225 Difference]: With dead ends: 329 [2020-07-20 06:09:04,618 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 06:09:04,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 06:09:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 06:09:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-07-20 06:09:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-20 06:09:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 208 transitions. [2020-07-20 06:09:04,625 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 208 transitions. Word has length 122 [2020-07-20 06:09:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:09:04,626 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 208 transitions. [2020-07-20 06:09:04,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 06:09:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 208 transitions. [2020-07-20 06:09:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-20 06:09:04,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:09:04,627 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:09:04,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:04,828 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:09:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:09:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash -147229406, now seen corresponding path program 26 times [2020-07-20 06:09:04,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:09:04,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903063307] [2020-07-20 06:09:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:09:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:05,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903063307] [2020-07-20 06:09:05,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379250870] [2020-07-20 06:09:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e62fb26 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:09,280 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e62fb26 issued 3 check-sat command(s) [2020-07-20 06:09:09,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:09:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 06:09:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:09:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:09,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:09:09,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2020-07-20 06:09:09,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878282368] [2020-07-20 06:09:09,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 06:09:09,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:09:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 06:09:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 06:09:09,345 INFO L87 Difference]: Start difference. First operand 190 states and 208 transitions. Second operand 34 states. [2020-07-20 06:09:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:09:09,835 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2020-07-20 06:09:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-20 06:09:09,836 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 124 [2020-07-20 06:09:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:09:09,838 INFO L225 Difference]: With dead ends: 340 [2020-07-20 06:09:09,838 INFO L226 Difference]: Without dead ends: 215 [2020-07-20 06:09:09,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 06:09:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-20 06:09:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2020-07-20 06:09:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-20 06:09:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 215 transitions. [2020-07-20 06:09:09,856 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 215 transitions. Word has length 124 [2020-07-20 06:09:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:09:09,857 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 215 transitions. [2020-07-20 06:09:09,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 06:09:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 215 transitions. [2020-07-20 06:09:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-20 06:09:09,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:09:09,858 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:09:10,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-07-20 06:09:10,074 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:09:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:09:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1257297532, now seen corresponding path program 27 times [2020-07-20 06:09:10,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:09:10,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538322010] [2020-07-20 06:09:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:09:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:10,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538322010] [2020-07-20 06:09:10,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48016231] [2020-07-20 06:09:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22fd458f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:17,697 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22fd458f issued 3 check-sat command(s) [2020-07-20 06:09:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:09:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 06:09:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:09:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:17,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:09:17,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-07-20 06:09:17,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094018177] [2020-07-20 06:09:17,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 06:09:17,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:09:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 06:09:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 06:09:17,790 INFO L87 Difference]: Start difference. First operand 196 states and 215 transitions. Second operand 35 states. [2020-07-20 06:09:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:09:18,236 INFO L93 Difference]: Finished difference Result 351 states and 391 transitions. [2020-07-20 06:09:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 06:09:18,236 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-07-20 06:09:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:09:18,238 INFO L225 Difference]: With dead ends: 351 [2020-07-20 06:09:18,238 INFO L226 Difference]: Without dead ends: 222 [2020-07-20 06:09:18,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 06:09:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-20 06:09:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-07-20 06:09:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-20 06:09:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 222 transitions. [2020-07-20 06:09:18,246 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 222 transitions. Word has length 126 [2020-07-20 06:09:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:09:18,246 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 222 transitions. [2020-07-20 06:09:18,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 06:09:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 222 transitions. [2020-07-20 06:09:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-20 06:09:18,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:09:18,248 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:09:18,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:18,448 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:09:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:09:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1414090086, now seen corresponding path program 28 times [2020-07-20 06:09:18,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:09:18,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056937367] [2020-07-20 06:09:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:09:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:19,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056937367] [2020-07-20 06:09:19,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964598768] [2020-07-20 06:09:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43c404b8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:28,157 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43c404b8 issued 3 check-sat command(s) [2020-07-20 06:09:28,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:09:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 06:09:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:09:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:28,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:09:28,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2020-07-20 06:09:28,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962793219] [2020-07-20 06:09:28,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 06:09:28,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:09:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 06:09:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 06:09:28,243 INFO L87 Difference]: Start difference. First operand 202 states and 222 transitions. Second operand 36 states. [2020-07-20 06:09:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:09:28,657 INFO L93 Difference]: Finished difference Result 362 states and 404 transitions. [2020-07-20 06:09:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 06:09:28,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 128 [2020-07-20 06:09:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:09:28,660 INFO L225 Difference]: With dead ends: 362 [2020-07-20 06:09:28,660 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 06:09:28,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 06:09:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 06:09:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2020-07-20 06:09:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 06:09:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2020-07-20 06:09:28,667 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 128 [2020-07-20 06:09:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:09:28,667 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2020-07-20 06:09:28,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 06:09:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2020-07-20 06:09:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 06:09:28,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:09:28,668 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:09:28,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-20 06:09:28,883 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:09:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:09:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 227147976, now seen corresponding path program 29 times [2020-07-20 06:09:28,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:09:28,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025765887] [2020-07-20 06:09:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:09:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:29,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025765887] [2020-07-20 06:09:29,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679453416] [2020-07-20 06:09:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79a3041 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:09:55,592 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79a3041 issued 3 check-sat command(s) [2020-07-20 06:09:55,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:09:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 06:09:55,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:09:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:55,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:09:55,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-07-20 06:09:55,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898425277] [2020-07-20 06:09:55,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 06:09:55,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:09:55,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 06:09:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 06:09:55,793 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand 37 states. [2020-07-20 06:09:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:09:56,239 INFO L93 Difference]: Finished difference Result 373 states and 417 transitions. [2020-07-20 06:09:56,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 06:09:56,240 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 130 [2020-07-20 06:09:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:09:56,241 INFO L225 Difference]: With dead ends: 373 [2020-07-20 06:09:56,242 INFO L226 Difference]: Without dead ends: 236 [2020-07-20 06:09:56,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 06:09:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-20 06:09:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2020-07-20 06:09:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 06:09:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 236 transitions. [2020-07-20 06:09:56,252 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 236 transitions. Word has length 130 [2020-07-20 06:09:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:09:56,252 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 236 transitions. [2020-07-20 06:09:56,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 06:09:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 236 transitions. [2020-07-20 06:09:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-20 06:09:56,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:09:56,253 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:09:56,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-20 06:09:56,467 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:09:56,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:09:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2037081002, now seen corresponding path program 30 times [2020-07-20 06:09:56,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:09:56,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445244590] [2020-07-20 06:09:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:09:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:09:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:09:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445244590] [2020-07-20 06:09:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436829849] [2020-07-20 06:09:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f8195c1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:33,508 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f8195c1 issued 3 check-sat command(s) [2020-07-20 06:10:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 06:10:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1427 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:10:33,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:33,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2020-07-20 06:10:33,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810759933] [2020-07-20 06:10:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 06:10:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 06:10:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 06:10:33,862 INFO L87 Difference]: Start difference. First operand 214 states and 236 transitions. Second operand 38 states. [2020-07-20 06:10:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:34,339 INFO L93 Difference]: Finished difference Result 384 states and 430 transitions. [2020-07-20 06:10:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 06:10:34,339 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2020-07-20 06:10:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:34,341 INFO L225 Difference]: With dead ends: 384 [2020-07-20 06:10:34,341 INFO L226 Difference]: Without dead ends: 243 [2020-07-20 06:10:34,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 06:10:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-20 06:10:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2020-07-20 06:10:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-20 06:10:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 243 transitions. [2020-07-20 06:10:34,348 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 243 transitions. Word has length 132 [2020-07-20 06:10:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:34,349 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 243 transitions. [2020-07-20 06:10:34,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 06:10:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 243 transitions. [2020-07-20 06:10:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 06:10:34,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:34,350 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:34,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-20 06:10:34,565 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1920964108, now seen corresponding path program 31 times [2020-07-20 06:10:34,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:34,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403352537] [2020-07-20 06:10:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:10:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:10:35,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403352537] [2020-07-20 06:10:35,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378768896] [2020-07-20 06:10:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40205649 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:57,047 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40205649 issued 3 check-sat command(s) [2020-07-20 06:10:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 06:10:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:10:57,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-07-20 06:10:57,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844382783] [2020-07-20 06:10:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 06:10:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 06:10:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 06:10:57,237 INFO L87 Difference]: Start difference. First operand 220 states and 243 transitions. Second operand 39 states. [2020-07-20 06:10:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:57,706 INFO L93 Difference]: Finished difference Result 395 states and 443 transitions. [2020-07-20 06:10:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 06:10:57,706 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 134 [2020-07-20 06:10:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:57,709 INFO L225 Difference]: With dead ends: 395 [2020-07-20 06:10:57,709 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 06:10:57,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 06:10:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 06:10:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 226. [2020-07-20 06:10:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-07-20 06:10:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2020-07-20 06:10:57,715 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 134 [2020-07-20 06:10:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:57,716 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2020-07-20 06:10:57,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 06:10:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2020-07-20 06:10:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-20 06:10:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:57,717 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:57,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-20 06:10:57,933 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2001778670, now seen corresponding path program 32 times [2020-07-20 06:10:57,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:57,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393968171] [2020-07-20 06:10:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:10:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:10:58,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393968171] [2020-07-20 06:10:58,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314612444] [2020-07-20 06:10:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@794ae51e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:38,639 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@794ae51e issued 3 check-sat command(s) [2020-07-20 06:11:38,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 06:11:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:11:39,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:39,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2020-07-20 06:11:39,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272487140] [2020-07-20 06:11:39,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-20 06:11:39,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-20 06:11:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 06:11:39,238 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand 40 states. [2020-07-20 06:11:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:39,714 INFO L93 Difference]: Finished difference Result 406 states and 456 transitions. [2020-07-20 06:11:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 06:11:39,715 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 136 [2020-07-20 06:11:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:39,717 INFO L225 Difference]: With dead ends: 406 [2020-07-20 06:11:39,717 INFO L226 Difference]: Without dead ends: 257 [2020-07-20 06:11:39,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 06:11:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-20 06:11:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 232. [2020-07-20 06:11:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 06:11:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2020-07-20 06:11:39,726 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 136 [2020-07-20 06:11:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:39,726 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2020-07-20 06:11:39,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-20 06:11:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2020-07-20 06:11:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-07-20 06:11:39,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:39,727 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:39,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-20 06:11:39,941 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1939805872, now seen corresponding path program 33 times [2020-07-20 06:11:39,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:39,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810981617] [2020-07-20 06:11:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:11:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:11:40,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810981617] [2020-07-20 06:11:40,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945513018] [2020-07-20 06:11:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@554b786e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:12:11,470 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@554b786e issued 3 check-sat command(s) [2020-07-20 06:12:11,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:12:11,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 06:12:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:12:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:12:11,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:12:11,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2020-07-20 06:12:11,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683521298] [2020-07-20 06:12:11,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 06:12:11,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:12:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 06:12:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 06:12:11,686 INFO L87 Difference]: Start difference. First operand 232 states and 257 transitions. Second operand 41 states. [2020-07-20 06:12:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:12:12,212 INFO L93 Difference]: Finished difference Result 417 states and 469 transitions. [2020-07-20 06:12:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-20 06:12:12,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 138 [2020-07-20 06:12:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:12:12,214 INFO L225 Difference]: With dead ends: 417 [2020-07-20 06:12:12,214 INFO L226 Difference]: Without dead ends: 264 [2020-07-20 06:12:12,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 06:12:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-20 06:12:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 238. [2020-07-20 06:12:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-20 06:12:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 264 transitions. [2020-07-20 06:12:12,221 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 264 transitions. Word has length 138 [2020-07-20 06:12:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:12:12,221 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 264 transitions. [2020-07-20 06:12:12,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 06:12:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 264 transitions. [2020-07-20 06:12:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-20 06:12:12,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:12:12,222 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:12:12,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-20 06:12:12,435 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:12:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:12:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1641395662, now seen corresponding path program 34 times [2020-07-20 06:12:12,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:12:12,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143491670] [2020-07-20 06:12:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:12:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:12:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:12:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:12:13,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143491670] [2020-07-20 06:12:13,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142829490] [2020-07-20 06:12:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a71415c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:02,542 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3a71415c issued 3 check-sat command(s) [2020-07-20 06:13:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-20 06:13:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:13:02,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:13:02,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2020-07-20 06:13:02,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141816994] [2020-07-20 06:13:02,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-20 06:13:02,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-20 06:13:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 06:13:02,963 INFO L87 Difference]: Start difference. First operand 238 states and 264 transitions. Second operand 42 states. [2020-07-20 06:13:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:03,510 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2020-07-20 06:13:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-20 06:13:03,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 140 [2020-07-20 06:13:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:03,512 INFO L225 Difference]: With dead ends: 428 [2020-07-20 06:13:03,513 INFO L226 Difference]: Without dead ends: 271 [2020-07-20 06:13:03,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 06:13:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-20 06:13:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 244. [2020-07-20 06:13:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-20 06:13:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 271 transitions. [2020-07-20 06:13:03,520 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 271 transitions. Word has length 140 [2020-07-20 06:13:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:03,520 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 271 transitions. [2020-07-20 06:13:03,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-20 06:13:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 271 transitions. [2020-07-20 06:13:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 06:13:03,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:03,522 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:03,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-20 06:13:03,736 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1662974612, now seen corresponding path program 35 times [2020-07-20 06:13:03,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:03,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696252205] [2020-07-20 06:13:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:13:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:13:04,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696252205] [2020-07-20 06:13:04,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242216668] [2020-07-20 06:13:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@595f60ea No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:36,136 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@595f60ea issued 3 check-sat command(s) [2020-07-20 06:13:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 06:13:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:13:36,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:13:36,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2020-07-20 06:13:36,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006109343] [2020-07-20 06:13:36,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 06:13:36,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:36,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 06:13:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 06:13:36,373 INFO L87 Difference]: Start difference. First operand 244 states and 271 transitions. Second operand 43 states. [2020-07-20 06:13:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:36,840 INFO L93 Difference]: Finished difference Result 439 states and 495 transitions. [2020-07-20 06:13:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 06:13:36,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 142 [2020-07-20 06:13:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:36,843 INFO L225 Difference]: With dead ends: 439 [2020-07-20 06:13:36,843 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 06:13:36,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 06:13:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 06:13:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 250. [2020-07-20 06:13:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-07-20 06:13:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 278 transitions. [2020-07-20 06:13:36,850 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 278 transitions. Word has length 142 [2020-07-20 06:13:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:36,851 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 278 transitions. [2020-07-20 06:13:36,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 06:13:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 278 transitions. [2020-07-20 06:13:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-20 06:13:36,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:36,852 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:37,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:37,065 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1112991114, now seen corresponding path program 36 times [2020-07-20 06:13:37,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:37,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683234690] [2020-07-20 06:13:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:13:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:13:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683234690] [2020-07-20 06:13:38,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340554613] [2020-07-20 06:13:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51699a0f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:02,744 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51699a0f issued 3 check-sat command(s) [2020-07-20 06:20:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:20:14,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 06:20:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:20:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:20:14,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:20:14,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2020-07-20 06:20:14,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326764610] [2020-07-20 06:20:14,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-20 06:20:14,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:20:14,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-20 06:20:14,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 06:20:14,307 INFO L87 Difference]: Start difference. First operand 250 states and 278 transitions. Second operand 44 states. [2020-07-20 06:20:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:20:14,958 INFO L93 Difference]: Finished difference Result 450 states and 508 transitions. [2020-07-20 06:20:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 06:20:14,958 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 144 [2020-07-20 06:20:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:20:14,960 INFO L225 Difference]: With dead ends: 450 [2020-07-20 06:20:14,961 INFO L226 Difference]: Without dead ends: 285 [2020-07-20 06:20:14,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 06:20:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-20 06:20:14,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 256. [2020-07-20 06:20:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-20 06:20:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2020-07-20 06:20:14,968 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 144 [2020-07-20 06:20:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:20:14,969 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2020-07-20 06:20:14,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-20 06:20:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2020-07-20 06:20:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-20 06:20:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:20:14,970 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:20:15,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:20:15,184 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:20:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:20:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1641362984, now seen corresponding path program 37 times [2020-07-20 06:20:15,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:20:15,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520378555] [2020-07-20 06:20:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:20:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:20:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:20:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:20:16,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520378555] [2020-07-20 06:20:16,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323040256] [2020-07-20 06:20:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d344382 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:34,855 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d344382 issued 3 check-sat command(s) [2020-07-20 06:21:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:21:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 06:21:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:21:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:21:36,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:21:36,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2020-07-20 06:21:36,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417350829] [2020-07-20 06:21:36,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 06:21:36,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:21:36,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 06:21:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 06:21:36,196 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand 45 states. [2020-07-20 06:21:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:21:36,731 INFO L93 Difference]: Finished difference Result 461 states and 521 transitions. [2020-07-20 06:21:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-20 06:21:36,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 146 [2020-07-20 06:21:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:21:36,733 INFO L225 Difference]: With dead ends: 461 [2020-07-20 06:21:36,733 INFO L226 Difference]: Without dead ends: 292 [2020-07-20 06:21:36,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 06:21:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-20 06:21:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2020-07-20 06:21:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-07-20 06:21:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 292 transitions. [2020-07-20 06:21:36,740 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 292 transitions. Word has length 146 [2020-07-20 06:21:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:21:36,741 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 292 transitions. [2020-07-20 06:21:36,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 06:21:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 292 transitions. [2020-07-20 06:21:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-20 06:21:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:21:36,742 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:21:36,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:21:36,957 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:21:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:21:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1694378170, now seen corresponding path program 38 times [2020-07-20 06:21:36,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:21:36,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999011097] [2020-07-20 06:21:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:21:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:21:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:21:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:21:38,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999011097] [2020-07-20 06:21:38,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875702002] [2020-07-20 06:21:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7253d490 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:22:06,181 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7253d490 issued 3 check-sat command(s) [2020-07-20 06:22:06,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:22:06,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-20 06:22:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:22:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:22:06,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:22:06,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2020-07-20 06:22:06,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873804443] [2020-07-20 06:22:06,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-20 06:22:06,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:22:06,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-20 06:22:06,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 06:22:06,381 INFO L87 Difference]: Start difference. First operand 262 states and 292 transitions. Second operand 46 states. [2020-07-20 06:22:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:22:06,931 INFO L93 Difference]: Finished difference Result 472 states and 534 transitions. [2020-07-20 06:22:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-20 06:22:06,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-07-20 06:22:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:22:06,934 INFO L225 Difference]: With dead ends: 472 [2020-07-20 06:22:06,934 INFO L226 Difference]: Without dead ends: 299 [2020-07-20 06:22:06,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 06:22:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-20 06:22:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 268. [2020-07-20 06:22:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-07-20 06:22:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2020-07-20 06:22:06,942 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 148 [2020-07-20 06:22:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:22:06,942 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2020-07-20 06:22:06,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-20 06:22:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2020-07-20 06:22:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-20 06:22:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:22:06,944 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:22:07,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-07-20 06:22:07,145 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:22:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:22:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash -998942948, now seen corresponding path program 39 times [2020-07-20 06:22:07,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:22:07,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527341885] [2020-07-20 06:22:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e34732d [2020-07-20 06:22:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:22:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:22:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-07-20 06:22:08,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527341885] [2020-07-20 06:22:08,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480680267] [2020-07-20 06:22:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57920924 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true