/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 NUM_FUNCTIONS --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_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:40:57,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:40:57,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:40:57,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:40:57,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:40:57,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:40:57,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:40:57,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:40:57,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:40:57,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:40:57,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:40:57,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:40:57,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:40:57,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:40:57,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:40:57,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:40:57,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:40:57,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:40:57,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:40:58,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:40:58,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:40:58,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:40:58,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:40:58,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:40:58,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:40:58,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:40:58,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:40:58,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:40:58,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:40:58,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-19 23:40:58,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:40:58,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:40:58,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:40:58,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:40:58,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:40:58,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:40:58,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:40:58,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:40:58,087 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:40:58,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:40:58,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:40:58,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:40:58,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:40:58,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:40:58,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:40:58,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:40:58,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:40:58,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:40:58,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:40:58,093 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:40:58,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:40:58,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:40:58,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:40:58,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:40:58,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:40:58,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:40:58,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:40:58,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:40:58,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:40:58,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:40:58,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:40:58,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:40:58,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:40:58,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:40:58,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:40:58,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:40:58,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:40:58,474 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:40:58,477 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:40:58,479 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-19 23:40:58,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca519204/fb2834f465d14a36b3080d2d901bed42/FLAGc73a5a80f [2020-07-19 23:40:59,262 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:40:59,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-19 23:40:59,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca519204/fb2834f465d14a36b3080d2d901bed42/FLAGc73a5a80f [2020-07-19 23:40:59,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ca519204/fb2834f465d14a36b3080d2d901bed42 [2020-07-19 23:40:59,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:40:59,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:40:59,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:59,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:40:59,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:40:59,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:40:59,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f99e6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59, skipping insertion in model container [2020-07-19 23:40:59,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:40:59,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:40:59,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:40:59,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:59,829 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:40:59,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:59,886 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:40:59,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59 WrapperNode [2020-07-19 23:40:59,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:59,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:40:59,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:40:59,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:41:00,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... [2020-07-19 23:41:00,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:41:00,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:41:00,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:41:00,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:41:00,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:41:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:41:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:41:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:41:00,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:41:00,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:41:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:41:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:41:00,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:41:00,383 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:41:00,383 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 23:41:00,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:41:00 BoogieIcfgContainer [2020-07-19 23:41:00,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:41:00,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:41:00,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:41:00,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:41:00,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:40:59" (1/3) ... [2020-07-19 23:41:00,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f38042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:41:00, skipping insertion in model container [2020-07-19 23:41:00,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:59" (2/3) ... [2020-07-19 23:41:00,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f38042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:41:00, skipping insertion in model container [2020-07-19 23:41:00,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:41:00" (3/3) ... [2020-07-19 23:41:00,423 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-07-19 23:41:00,462 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:41:00,486 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:41:00,536 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:41:00,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:41:00,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:41:00,578 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:41:00,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:41:00,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:41:00,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:41:00,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:41:00,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:41:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-19 23:41:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-19 23:41:00,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:00,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:00,618 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-07-19 23:41:00,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:00,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055155490] [2020-07-19 23:41:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:00,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055155490] [2020-07-19 23:41:00,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:41:00,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:41:00,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124650387] [2020-07-19 23:41:00,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:41:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:00,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:41:00,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:41:00,866 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-07-19 23:41:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:00,971 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-19 23:41:00,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:41:00,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-19 23:41:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:00,981 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:41:00,982 INFO L226 Difference]: Without dead ends: 14 [2020-07-19 23:41:00,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:41:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-19 23:41:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-19 23:41:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-19 23:41:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-19 23:41:01,036 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-19 23:41:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,037 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-19 23:41:01,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:41:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-19 23:41:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-19 23:41:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:41:01,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-07-19 23:41:01,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909854544] [2020-07-19 23:41:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909854544] [2020-07-19 23:41:01,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:41:01,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:41:01,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65037312] [2020-07-19 23:41:01,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:41:01,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:41:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:41:01,158 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-07-19 23:41:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:01,240 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-19 23:41:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:41:01,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-07-19 23:41:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:01,242 INFO L225 Difference]: With dead ends: 22 [2020-07-19 23:41:01,242 INFO L226 Difference]: Without dead ends: 16 [2020-07-19 23:41:01,244 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 [2020-07-19 23:41:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-19 23:41:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-19 23:41:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 23:41:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-19 23:41:01,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-19 23:41:01,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,256 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-19 23:41:01,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:41:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-19 23:41:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:41:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:41:01,259 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-07-19 23:41:01,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861035662] [2020-07-19 23:41:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861035662] [2020-07-19 23:41:01,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693805926] [2020-07-19 23:41:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15d71e2d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:01,502 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15d71e2d issued 2 check-sat command(s) [2020-07-19 23:41:01,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:01,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:41:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:01,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 23:41:01,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518870926] [2020-07-19 23:41:01,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:41:01,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:41:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:41:01,569 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-07-19 23:41:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:01,667 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-07-19 23:41:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:41:01,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-19 23:41:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:01,669 INFO L225 Difference]: With dead ends: 24 [2020-07-19 23:41:01,670 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:41:01,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:41:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:41:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-07-19 23:41:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-19 23:41:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-19 23:41:01,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-19 23:41:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:01,677 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-19 23:41:01,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:41:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-19 23:41:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 23:41:01,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:01,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:01,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:41:01,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-07-19 23:41:01,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:01,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607275992] [2020-07-19 23:41:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:01,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607275992] [2020-07-19 23:41:01,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755610208] [2020-07-19 23:41:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c2254e7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,039 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2c2254e7 issued 3 check-sat command(s) [2020-07-19 23:41:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:41:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:02,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:02,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 23:41:02,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703134354] [2020-07-19 23:41:02,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:41:02,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:41:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:41:02,070 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-07-19 23:41:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:02,129 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-07-19 23:41:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:41:02,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-07-19 23:41:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:02,130 INFO L225 Difference]: With dead ends: 26 [2020-07-19 23:41:02,131 INFO L226 Difference]: Without dead ends: 20 [2020-07-19 23:41:02,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:41:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-19 23:41:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-19 23:41:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-19 23:41:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-19 23:41:02,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-19 23:41:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:02,139 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-19 23:41:02,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:41:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-19 23:41:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 23:41:02,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:02,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:02,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:02,358 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-07-19 23:41:02,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:02,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224611441] [2020-07-19 23:41:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:02,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224611441] [2020-07-19 23:41:02,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037598534] [2020-07-19 23:41:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7aef1f96 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,572 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7aef1f96 issued 3 check-sat command(s) [2020-07-19 23:41:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:41:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:02,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:02,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 23:41:02,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054135344] [2020-07-19 23:41:02,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:41:02,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:41:02,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:41:02,601 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-19 23:41:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:02,671 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-07-19 23:41:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:41:02,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-19 23:41:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:02,673 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:41:02,673 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 23:41:02,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:41:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 23:41:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-19 23:41:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:41:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-19 23:41:02,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-07-19 23:41:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:02,679 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-19 23:41:02,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:41:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-19 23:41:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:41:02,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:02,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:02,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:02,894 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:02,894 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-07-19 23:41:02,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:02,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106700772] [2020-07-19 23:41:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:02,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106700772] [2020-07-19 23:41:02,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946162714] [2020-07-19 23:41:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3743c082 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:03,012 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3743c082 issued 3 check-sat command(s) [2020-07-19 23:41:03,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:03,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:41:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:03,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:03,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 23:41:03,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430175524] [2020-07-19 23:41:03,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:41:03,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:41:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:41:03,044 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 9 states. [2020-07-19 23:41:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:03,110 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-19 23:41:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:41:03,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-19 23:41:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:03,111 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:41:03,111 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:41:03,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:41:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:41:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-19 23:41:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 23:41:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-19 23:41:03,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-07-19 23:41:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:03,123 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-19 23:41:03,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:41:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-19 23:41:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:41:03,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:03,127 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:03,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:03,342 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:03,342 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-07-19 23:41:03,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:03,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023777008] [2020-07-19 23:41:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:03,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023777008] [2020-07-19 23:41:03,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873756901] [2020-07-19 23:41:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@116c22ac No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:03,497 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@116c22ac issued 3 check-sat command(s) [2020-07-19 23:41:03,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:41:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:03,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:03,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-19 23:41:03,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665987739] [2020-07-19 23:41:03,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:41:03,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:03,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:41:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:41:03,539 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2020-07-19 23:41:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:03,607 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-07-19 23:41:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:41:03,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-19 23:41:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:03,608 INFO L225 Difference]: With dead ends: 32 [2020-07-19 23:41:03,609 INFO L226 Difference]: Without dead ends: 26 [2020-07-19 23:41:03,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:41:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-19 23:41:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-19 23:41:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:41:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-19 23:41:03,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-07-19 23:41:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:03,615 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-19 23:41:03,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:41:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-19 23:41:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:41:03,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:03,617 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:03,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:41:03,820 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-07-19 23:41:03,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:03,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689532356] [2020-07-19 23:41:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:04,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689532356] [2020-07-19 23:41:04,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035537539] [2020-07-19 23:41:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ececce1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:04,082 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ececce1 issued 3 check-sat command(s) [2020-07-19 23:41:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:41:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:04,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:04,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-19 23:41:04,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170464713] [2020-07-19 23:41:04,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:41:04,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:41:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:41:04,116 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 11 states. [2020-07-19 23:41:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:04,218 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-19 23:41:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:41:04,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-07-19 23:41:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:04,221 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:41:04,221 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 23:41:04,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:41:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 23:41:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-19 23:41:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:41:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-19 23:41:04,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-07-19 23:41:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:04,230 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-19 23:41:04,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:41:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-19 23:41:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:41:04,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:04,231 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:04,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:04,446 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-07-19 23:41:04,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:04,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777829742] [2020-07-19 23:41:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:04,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777829742] [2020-07-19 23:41:04,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341538305] [2020-07-19 23:41:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1713e15c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:04,693 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1713e15c issued 3 check-sat command(s) [2020-07-19 23:41:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:41:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:04,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:04,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-19 23:41:04,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377039230] [2020-07-19 23:41:04,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:41:04,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:04,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:41:04,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:41:04,755 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-07-19 23:41:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:04,857 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-07-19 23:41:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:41:04,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-07-19 23:41:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:04,858 INFO L225 Difference]: With dead ends: 36 [2020-07-19 23:41:04,858 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:41:04,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:41:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:41:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 23:41:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:41:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-19 23:41:04,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-19 23:41:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:04,868 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-19 23:41:04,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:41:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-19 23:41:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:41:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:04,869 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:05,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:05,071 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-07-19 23:41:05,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:05,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23067939] [2020-07-19 23:41:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:05,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23067939] [2020-07-19 23:41:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961258753] [2020-07-19 23:41:05,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d903bbe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:05,395 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d903bbe issued 3 check-sat command(s) [2020-07-19 23:41:05,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:41:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:05,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:05,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-19 23:41:05,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853267899] [2020-07-19 23:41:05,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:41:05,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:05,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:41:05,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:41:05,424 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 13 states. [2020-07-19 23:41:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:05,506 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-07-19 23:41:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:41:05,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-07-19 23:41:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:05,508 INFO L225 Difference]: With dead ends: 38 [2020-07-19 23:41:05,508 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:41:05,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:41:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:41:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-19 23:41:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:41:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-07-19 23:41:05,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-07-19 23:41:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:05,517 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-07-19 23:41:05,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:41:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-07-19 23:41:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:41:05,518 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:05,518 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:05,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:41:05,733 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-07-19 23:41:05,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:05,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234688311] [2020-07-19 23:41:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:05,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234688311] [2020-07-19 23:41:05,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453806715] [2020-07-19 23:41:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f096cd1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:05,998 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f096cd1 issued 3 check-sat command(s) [2020-07-19 23:41:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:41:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:06,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:06,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-19 23:41:06,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377918964] [2020-07-19 23:41:06,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:41:06,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:41:06,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:41:06,033 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 14 states. [2020-07-19 23:41:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:06,137 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-07-19 23:41:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:41:06,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-07-19 23:41:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:06,138 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:41:06,138 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:41:06,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:41:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:41:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-19 23:41:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:41:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-19 23:41:06,144 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-07-19 23:41:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:06,144 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-19 23:41:06,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:41:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-19 23:41:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 23:41:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:06,146 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:06,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:06,359 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-07-19 23:41:06,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:06,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375753613] [2020-07-19 23:41:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:06,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375753613] [2020-07-19 23:41:06,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112525091] [2020-07-19 23:41:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ad16c61 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:06,826 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ad16c61 issued 4 check-sat command(s) [2020-07-19 23:41:06,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:41:06,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:06,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:06,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-19 23:41:06,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128681123] [2020-07-19 23:41:06,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:41:06,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:41:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:41:06,869 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 15 states. [2020-07-19 23:41:07,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:07,013 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-07-19 23:41:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:41:07,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-07-19 23:41:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:07,015 INFO L225 Difference]: With dead ends: 42 [2020-07-19 23:41:07,015 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:41:07,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:41:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:41:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-19 23:41:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:41:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-19 23:41:07,022 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-07-19 23:41:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:07,023 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-19 23:41:07,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:41:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-19 23:41:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:41:07,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:07,026 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:07,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:07,241 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:07,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-07-19 23:41:07,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:07,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258437705] [2020-07-19 23:41:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:07,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258437705] [2020-07-19 23:41:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230179109] [2020-07-19 23:41:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d48d4c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:07,712 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d48d4c issued 3 check-sat command(s) [2020-07-19 23:41:07,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:41:07,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:07,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:07,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-19 23:41:07,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212719703] [2020-07-19 23:41:07,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:41:07,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:41:07,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:41:07,767 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 16 states. [2020-07-19 23:41:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:07,861 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-19 23:41:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:41:07,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-07-19 23:41:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:07,862 INFO L225 Difference]: With dead ends: 44 [2020-07-19 23:41:07,862 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 23:41:07,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:41:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 23:41:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-19 23:41:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 23:41:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-07-19 23:41:07,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-07-19 23:41:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:07,869 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-07-19 23:41:07,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:41:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-07-19 23:41:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 23:41:07,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:07,870 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:08,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:41:08,082 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:08,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-07-19 23:41:08,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:08,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706573242] [2020-07-19 23:41:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:08,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706573242] [2020-07-19 23:41:08,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383785957] [2020-07-19 23:41:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7620db04 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:08,515 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7620db04 issued 4 check-sat command(s) [2020-07-19 23:41:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:08,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:41:08,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:08,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:08,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-07-19 23:41:08,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808177689] [2020-07-19 23:41:08,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:41:08,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:08,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:41:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:41:08,579 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 17 states. [2020-07-19 23:41:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:08,700 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-07-19 23:41:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:41:08,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-07-19 23:41:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:08,702 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:41:08,702 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 23:41:08,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:41:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 23:41:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-19 23:41:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:41:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-07-19 23:41:08,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-07-19 23:41:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:08,709 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-07-19 23:41:08,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:41:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-07-19 23:41:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 23:41:08,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:08,711 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:08,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:41:08,915 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-07-19 23:41:08,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:08,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424499422] [2020-07-19 23:41:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:09,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424499422] [2020-07-19 23:41:09,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719746455] [2020-07-19 23:41:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d3ec3a 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 [2020-07-19 23:41:09,502 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d3ec3a issued 4 check-sat command(s) [2020-07-19 23:41:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 23:41:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:09,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:09,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-19 23:41:09,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346703996] [2020-07-19 23:41:09,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:41:09,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:41:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:41:09,554 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 18 states. [2020-07-19 23:41:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:09,661 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-07-19 23:41:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:41:09,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-07-19 23:41:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:09,663 INFO L225 Difference]: With dead ends: 48 [2020-07-19 23:41:09,663 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:41:09,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:41:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:41:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 23:41:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 23:41:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-19 23:41:09,670 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-07-19 23:41:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:09,670 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-19 23:41:09,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:41:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-19 23:41:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:41:09,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:09,672 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:09,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 23:41:09,883 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-07-19 23:41:09,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:09,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214849391] [2020-07-19 23:41:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:10,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214849391] [2020-07-19 23:41:10,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544097844] [2020-07-19 23:41:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d235013 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:10,439 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d235013 issued 4 check-sat command(s) [2020-07-19 23:41:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:41:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:10,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:10,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-19 23:41:10,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014634094] [2020-07-19 23:41:10,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:41:10,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:41:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:41:10,463 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 19 states. [2020-07-19 23:41:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:10,584 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-07-19 23:41:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:41:10,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-07-19 23:41:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:10,586 INFO L225 Difference]: With dead ends: 50 [2020-07-19 23:41:10,586 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 23:41:10,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:41:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 23:41:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-19 23:41:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 23:41:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-07-19 23:41:10,592 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-07-19 23:41:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:10,593 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-07-19 23:41:10,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:41:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-07-19 23:41:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 23:41:10,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:10,594 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:10,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:10,808 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-07-19 23:41:10,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:10,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795594006] [2020-07-19 23:41:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:11,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795594006] [2020-07-19 23:41:11,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158637426] [2020-07-19 23:41:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e28305c 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 [2020-07-19 23:41:11,504 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e28305c issued 4 check-sat command(s) [2020-07-19 23:41:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:11,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 23:41:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:11,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:11,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-19 23:41:11,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403861009] [2020-07-19 23:41:11,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:41:11,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:41:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:41:11,589 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 20 states. [2020-07-19 23:41:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:11,735 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-07-19 23:41:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:41:11,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-07-19 23:41:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:11,738 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:41:11,739 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 23:41:11,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:41:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 23:41:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-19 23:41:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:41:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-07-19 23:41:11,748 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-07-19 23:41:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:11,748 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-07-19 23:41:11,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:41:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-07-19 23:41:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 23:41:11,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:11,750 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:11,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 23:41:11,965 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-07-19 23:41:11,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:11,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454777922] [2020-07-19 23:41:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:12,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454777922] [2020-07-19 23:41:12,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453885292] [2020-07-19 23:41:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40dc3e00 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:13,206 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40dc3e00 issued 4 check-sat command(s) [2020-07-19 23:41:13,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:41:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:13,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:13,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-19 23:41:13,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267369121] [2020-07-19 23:41:13,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:41:13,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:41:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:41:13,285 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 21 states. [2020-07-19 23:41:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:13,462 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-07-19 23:41:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:41:13,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-07-19 23:41:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:13,465 INFO L225 Difference]: With dead ends: 54 [2020-07-19 23:41:13,465 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:41:13,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:41:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:41:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-19 23:41:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 23:41:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-19 23:41:13,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-07-19 23:41:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:13,493 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-19 23:41:13,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:41:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-19 23:41:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 23:41:13,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:13,499 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:13,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:41:13,701 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-07-19 23:41:13,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:13,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148863412] [2020-07-19 23:41:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:14,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148863412] [2020-07-19 23:41:14,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335705947] [2020-07-19 23:41:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fc548f3 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 [2020-07-19 23:41:15,026 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fc548f3 issued 4 check-sat command(s) [2020-07-19 23:41:15,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:15,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 23:41:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:15,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:15,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-19 23:41:15,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485728955] [2020-07-19 23:41:15,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:41:15,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:41:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:41:15,093 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 22 states. [2020-07-19 23:41:15,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:15,283 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-07-19 23:41:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:41:15,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-07-19 23:41:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:15,286 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:41:15,286 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 23:41:15,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:41:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 23:41:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 23:41:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 23:41:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-07-19 23:41:15,294 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-07-19 23:41:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:15,294 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-07-19 23:41:15,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:41:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-07-19 23:41:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 23:41:15,296 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:15,296 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:15,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:15,504 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-07-19 23:41:15,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:15,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935751179] [2020-07-19 23:41:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:15,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935751179] [2020-07-19 23:41:15,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701494801] [2020-07-19 23:41:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7746c691 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:17,298 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7746c691 issued 4 check-sat command(s) [2020-07-19 23:41:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:41:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:17,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:17,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-19 23:41:17,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381256425] [2020-07-19 23:41:17,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:41:17,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:41:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:41:17,337 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 23 states. [2020-07-19 23:41:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:17,519 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-07-19 23:41:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:41:17,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-07-19 23:41:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:17,521 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:41:17,521 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 23:41:17,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:41:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 23:41:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-19 23:41:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:41:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-07-19 23:41:17,533 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-07-19 23:41:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:17,533 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-07-19 23:41:17,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:41:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-07-19 23:41:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 23:41:17,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:17,535 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:17,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:17,748 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-07-19 23:41:17,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:17,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713839344] [2020-07-19 23:41:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:18,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713839344] [2020-07-19 23:41:18,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287886229] [2020-07-19 23:41:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ba457f9 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 [2020-07-19 23:41:20,332 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5ba457f9 issued 4 check-sat command(s) [2020-07-19 23:41:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 23:41:20,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:20,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:20,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-19 23:41:20,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306195944] [2020-07-19 23:41:20,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:41:20,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:41:20,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:41:20,383 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 24 states. [2020-07-19 23:41:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:20,536 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-07-19 23:41:20,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:41:20,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-07-19 23:41:20,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:20,539 INFO L225 Difference]: With dead ends: 60 [2020-07-19 23:41:20,539 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:41:20,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:41:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:41:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-19 23:41:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 23:41:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-07-19 23:41:20,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-07-19 23:41:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:20,555 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-07-19 23:41:20,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:41:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-07-19 23:41:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 23:41:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:20,558 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:20,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:20,774 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-07-19 23:41:20,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:20,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309108598] [2020-07-19 23:41:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:21,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309108598] [2020-07-19 23:41:21,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433768197] [2020-07-19 23:41:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52dd390d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:23,647 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52dd390d issued 4 check-sat command(s) [2020-07-19 23:41:23,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:41:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:23,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:23,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-07-19 23:41:23,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321091639] [2020-07-19 23:41:23,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:41:23,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:41:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:41:23,686 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 25 states. [2020-07-19 23:41:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:23,894 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-07-19 23:41:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:41:23,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-07-19 23:41:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:23,899 INFO L225 Difference]: With dead ends: 62 [2020-07-19 23:41:23,899 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 23:41:23,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:41:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 23:41:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 23:41:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 23:41:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-07-19 23:41:23,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-07-19 23:41:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:23,905 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-07-19 23:41:23,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:41:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-07-19 23:41:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 23:41:23,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:23,906 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:24,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 23:41:24,108 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-07-19 23:41:24,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:24,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455367027] [2020-07-19 23:41:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:24,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455367027] [2020-07-19 23:41:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859259211] [2020-07-19 23:41:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54432d72 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 [2020-07-19 23:41:26,388 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@54432d72 issued 4 check-sat command(s) [2020-07-19 23:41:26,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 23:41:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:26,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:26,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-07-19 23:41:26,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457386134] [2020-07-19 23:41:26,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 23:41:26,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 23:41:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:41:26,438 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 26 states. [2020-07-19 23:41:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:26,578 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-07-19 23:41:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:41:26,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-07-19 23:41:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:26,580 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:41:26,580 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 23:41:26,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:41:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 23:41:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 23:41:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:41:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-19 23:41:26,586 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-07-19 23:41:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:26,587 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-19 23:41:26,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 23:41:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-19 23:41:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 23:41:26,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:26,588 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:26,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 23:41:26,801 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:26,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-07-19 23:41:26,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:26,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775059892] [2020-07-19 23:41:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:27,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775059892] [2020-07-19 23:41:27,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597022888] [2020-07-19 23:41:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c4dc254 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:30,875 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c4dc254 issued 4 check-sat command(s) [2020-07-19 23:41:30,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:41:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:30,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:30,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-07-19 23:41:30,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236845191] [2020-07-19 23:41:30,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:41:30,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:41:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:41:30,955 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 27 states. [2020-07-19 23:41:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:31,161 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-07-19 23:41:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:41:31,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-19 23:41:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:31,164 INFO L225 Difference]: With dead ends: 66 [2020-07-19 23:41:31,164 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:41:31,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:41:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:41:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-07-19 23:41:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 23:41:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-19 23:41:31,171 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-07-19 23:41:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:31,171 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-19 23:41:31,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:41:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-19 23:41:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 23:41:31,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:31,173 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:31,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:31,387 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-07-19 23:41:31,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:31,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782594798] [2020-07-19 23:41:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782594798] [2020-07-19 23:41:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870381449] [2020-07-19 23:41:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b31e368 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 [2020-07-19 23:41:34,015 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b31e368 issued 4 check-sat command(s) [2020-07-19 23:41:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:34,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 23:41:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:34,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:34,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-07-19 23:41:34,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865745909] [2020-07-19 23:41:34,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:41:34,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:41:34,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:41:34,057 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 28 states. [2020-07-19 23:41:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:34,239 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-07-19 23:41:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:41:34,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-07-19 23:41:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:34,241 INFO L225 Difference]: With dead ends: 68 [2020-07-19 23:41:34,241 INFO L226 Difference]: Without dead ends: 62 [2020-07-19 23:41:34,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:41:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-19 23:41:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-07-19 23:41:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 23:41:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-07-19 23:41:34,246 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-07-19 23:41:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:34,247 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-07-19 23:41:34,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:41:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-07-19 23:41:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-19 23:41:34,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:34,248 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:34,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-19 23:41:34,458 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:34,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-07-19 23:41:34,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:34,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836501639] [2020-07-19 23:41:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836501639] [2020-07-19 23:41:35,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310743648] [2020-07-19 23:41:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916cfc9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:38,810 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916cfc9 issued 4 check-sat command(s) [2020-07-19 23:41:38,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:41:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:38,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:38,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-07-19 23:41:38,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884578615] [2020-07-19 23:41:38,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 23:41:38,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 23:41:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:41:38,852 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 29 states. [2020-07-19 23:41:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:39,045 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-07-19 23:41:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:41:39,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-07-19 23:41:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:39,046 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:41:39,046 INFO L226 Difference]: Without dead ends: 64 [2020-07-19 23:41:39,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:41:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-19 23:41:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-07-19 23:41:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 23:41:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-07-19 23:41:39,050 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-07-19 23:41:39,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:39,051 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-07-19 23:41:39,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 23:41:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-07-19 23:41:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-19 23:41:39,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:39,052 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:39,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:39,262 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:39,263 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-07-19 23:41:39,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:39,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117574319] [2020-07-19 23:41:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:39,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117574319] [2020-07-19 23:41:39,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112079415] [2020-07-19 23:41:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e3d4942 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 [2020-07-19 23:41:44,070 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e3d4942 issued 4 check-sat command(s) [2020-07-19 23:41:44,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-19 23:41:44,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:44,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:44,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-07-19 23:41:44,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919692744] [2020-07-19 23:41:44,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:41:44,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:41:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:41:44,125 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 30 states. [2020-07-19 23:41:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:44,303 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-07-19 23:41:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:41:44,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2020-07-19 23:41:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:44,305 INFO L225 Difference]: With dead ends: 72 [2020-07-19 23:41:44,306 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:41:44,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:41:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:41:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-07-19 23:41:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-19 23:41:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-07-19 23:41:44,311 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-07-19 23:41:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:44,311 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-07-19 23:41:44,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:41:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-07-19 23:41:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-19 23:41:44,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:44,312 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:44,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-19 23:41:44,513 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-07-19 23:41:44,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:44,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565882994] [2020-07-19 23:41:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:45,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565882994] [2020-07-19 23:41:45,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200747261] [2020-07-19 23:41:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c365355 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:41:50,421 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3c365355 issued 4 check-sat command(s) [2020-07-19 23:41:50,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:41:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:50,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:50,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-07-19 23:41:50,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229751668] [2020-07-19 23:41:50,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 23:41:50,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 23:41:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:41:50,462 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 31 states. [2020-07-19 23:41:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:50,646 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-07-19 23:41:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-19 23:41:50,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2020-07-19 23:41:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:50,648 INFO L225 Difference]: With dead ends: 74 [2020-07-19 23:41:50,648 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 23:41:50,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:41:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 23:41:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-07-19 23:41:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-19 23:41:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-07-19 23:41:50,655 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-07-19 23:41:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:50,655 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-07-19 23:41:50,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 23:41:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-07-19 23:41:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-19 23:41:50,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:50,656 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:50,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-19 23:41:50,857 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-07-19 23:41:50,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:50,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372006217] [2020-07-19 23:41:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:51,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372006217] [2020-07-19 23:41:51,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447546729] [2020-07-19 23:41:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e00626a 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 [2020-07-19 23:41:56,057 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e00626a issued 4 check-sat command(s) [2020-07-19 23:41:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:41:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 23:41:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:41:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:56,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:41:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2020-07-19 23:41:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805840866] [2020-07-19 23:41:56,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-19 23:41:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:41:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-19 23:41:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:41:56,117 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 32 states. [2020-07-19 23:41:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:41:56,321 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-07-19 23:41:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-19 23:41:56,321 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-07-19 23:41:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:41:56,322 INFO L225 Difference]: With dead ends: 76 [2020-07-19 23:41:56,322 INFO L226 Difference]: Without dead ends: 70 [2020-07-19 23:41:56,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:41:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-19 23:41:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-07-19 23:41:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 23:41:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-07-19 23:41:56,332 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-07-19 23:41:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:41:56,332 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-07-19 23:41:56,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-19 23:41:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-07-19 23:41:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 23:41:56,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:41:56,334 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:41:56,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-19 23:41:56,542 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:41:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:41:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-07-19 23:41:56,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:41:56,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590876632] [2020-07-19 23:41:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:41:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:41:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:41:57,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590876632] [2020-07-19 23:41:57,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167630749] [2020-07-19 23:41:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bf57ac1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:04,808 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bf57ac1 issued 4 check-sat command(s) [2020-07-19 23:42:04,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:42:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:04,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:04,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-07-19 23:42:04,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630811660] [2020-07-19 23:42:04,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 23:42:04,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 23:42:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:42:04,875 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 33 states. [2020-07-19 23:42:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:05,083 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-07-19 23:42:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-19 23:42:05,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2020-07-19 23:42:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:05,085 INFO L225 Difference]: With dead ends: 78 [2020-07-19 23:42:05,086 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 23:42:05,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:42:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 23:42:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-07-19 23:42:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-19 23:42:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-07-19 23:42:05,090 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-07-19 23:42:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:05,091 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-07-19 23:42:05,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 23:42:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-07-19 23:42:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-19 23:42:05,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:05,091 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:05,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:05,292 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-07-19 23:42:05,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:05,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685471420] [2020-07-19 23:42:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:42:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:05,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685471420] [2020-07-19 23:42:05,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034957913] [2020-07-19 23:42:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6804c8f5 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 [2020-07-19 23:42:15,311 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6804c8f5 issued 4 check-sat command(s) [2020-07-19 23:42:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-19 23:42:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:15,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:15,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2020-07-19 23:42:15,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395480237] [2020-07-19 23:42:15,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-19 23:42:15,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-19 23:42:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:42:15,398 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 34 states. [2020-07-19 23:42:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:15,658 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-07-19 23:42:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-19 23:42:15,659 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-07-19 23:42:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:15,660 INFO L225 Difference]: With dead ends: 80 [2020-07-19 23:42:15,660 INFO L226 Difference]: Without dead ends: 74 [2020-07-19 23:42:15,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-19 23:42:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-19 23:42:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-07-19 23:42:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-19 23:42:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-07-19 23:42:15,665 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-07-19 23:42:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:15,666 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-07-19 23:42:15,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-19 23:42:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-07-19 23:42:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-19 23:42:15,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:15,666 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:15,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-07-19 23:42:15,871 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:15,872 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-07-19 23:42:15,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:15,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188683194] [2020-07-19 23:42:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:42:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:16,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188683194] [2020-07-19 23:42:16,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361555430] [2020-07-19 23:42:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e684885 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:19,774 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e684885 issued 4 check-sat command(s) [2020-07-19 23:42:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:42:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:42:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:42:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:19,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:42:19,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-07-19 23:42:19,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368515444] [2020-07-19 23:42:19,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 23:42:19,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:42:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 23:42:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:42:19,825 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 35 states. [2020-07-19 23:42:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:42:20,053 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-07-19 23:42:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-19 23:42:20,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 72 [2020-07-19 23:42:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:42:20,055 INFO L225 Difference]: With dead ends: 82 [2020-07-19 23:42:20,056 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 23:42:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:42:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 23:42:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-07-19 23:42:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 23:42:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-07-19 23:42:20,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-07-19 23:42:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:42:20,063 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-07-19 23:42:20,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 23:42:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-07-19 23:42:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-07-19 23:42:20,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:42:20,064 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:42:20,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:42:20,266 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:42:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:42:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-07-19 23:42:20,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:42:20,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716936635] [2020-07-19 23:42:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:42:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:42:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:42:20,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716936635] [2020-07-19 23:42:20,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342465963] [2020-07-19 23:42:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@180d35b8 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 [2020-07-19 23:43:17,245 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@180d35b8 issued 4 check-sat command(s) [2020-07-19 23:43:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-19 23:43:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:17,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:17,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2020-07-19 23:43:17,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167563883] [2020-07-19 23:43:17,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-19 23:43:17,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-19 23:43:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:43:17,667 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 36 states. [2020-07-19 23:43:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:17,895 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-07-19 23:43:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-19 23:43:17,895 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-07-19 23:43:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:17,896 INFO L225 Difference]: With dead ends: 84 [2020-07-19 23:43:17,896 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 23:43:17,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:43:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 23:43:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-19 23:43:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-19 23:43:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-07-19 23:43:17,902 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-07-19 23:43:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:17,903 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-07-19 23:43:17,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-19 23:43:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-07-19 23:43:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-19 23:43:17,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:17,904 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:18,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-07-19 23:43:18,105 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-07-19 23:43:18,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:18,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652743508] [2020-07-19 23:43:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:43:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:18,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652743508] [2020-07-19 23:43:18,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849235526] [2020-07-19 23:43:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22a4cb9d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:34,108 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22a4cb9d issued 4 check-sat command(s) [2020-07-19 23:43:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 23:43:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:34,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:34,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-07-19 23:43:34,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104131739] [2020-07-19 23:43:34,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-19 23:43:34,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-19 23:43:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:43:34,195 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 37 states. [2020-07-19 23:43:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:34,371 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-07-19 23:43:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-19 23:43:34,371 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-07-19 23:43:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:34,373 INFO L225 Difference]: With dead ends: 86 [2020-07-19 23:43:34,373 INFO L226 Difference]: Without dead ends: 80 [2020-07-19 23:43:34,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:43:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-19 23:43:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-07-19 23:43:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-19 23:43:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-07-19 23:43:34,381 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-07-19 23:43:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:34,381 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-07-19 23:43:34,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-19 23:43:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-07-19 23:43:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-19 23:43:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:34,382 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:34,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-07-19 23:43:34,589 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-07-19 23:43:34,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:34,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479909038] [2020-07-19 23:43:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:43:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:35,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479909038] [2020-07-19 23:43:35,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112168460] [2020-07-19 23:43:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@654a3744 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 [2020-07-19 23:43:46,658 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@654a3744 issued 4 check-sat command(s) [2020-07-19 23:43:46,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-19 23:43:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:46,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:46,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2020-07-19 23:43:46,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118500219] [2020-07-19 23:43:46,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-19 23:43:46,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-19 23:43:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:43:46,736 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 38 states. [2020-07-19 23:43:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:46,931 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-07-19 23:43:46,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-19 23:43:46,931 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-07-19 23:43:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:46,936 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:43:46,936 INFO L226 Difference]: Without dead ends: 82 [2020-07-19 23:43:46,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 23:43:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-19 23:43:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-07-19 23:43:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 23:43:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-07-19 23:43:46,942 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-07-19 23:43:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:46,942 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-07-19 23:43:46,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-19 23:43:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-07-19 23:43:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-19 23:43:46,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:46,943 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:47,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-07-19 23:43:47,156 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-07-19 23:43:47,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:47,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502379443] [2020-07-19 23:43:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:43:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:47,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502379443] [2020-07-19 23:43:47,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089230489] [2020-07-19 23:43:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d963238 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:58,277 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1d963238 issued 4 check-sat command(s) [2020-07-19 23:43:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 23:43:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:58,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:58,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-07-19 23:43:58,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136071941] [2020-07-19 23:43:58,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 23:43:58,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 23:43:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:43:58,349 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 39 states. [2020-07-19 23:43:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:58,589 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-07-19 23:43:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-19 23:43:58,589 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 80 [2020-07-19 23:43:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:58,590 INFO L225 Difference]: With dead ends: 90 [2020-07-19 23:43:58,591 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 23:43:58,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:43:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 23:43:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-07-19 23:43:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-19 23:43:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-07-19 23:43:58,596 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-07-19 23:43:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:58,596 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-07-19 23:43:58,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-19 23:43:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-07-19 23:43:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-19 23:43:58,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:58,597 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:58,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-07-19 23:43:58,809 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-07-19 23:43:58,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:58,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695974494] [2020-07-19 23:43:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:43:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:59,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695974494] [2020-07-19 23:43:59,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278762772] [2020-07-19 23:43:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64b3e8bf 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 [2020-07-19 23:44:16,117 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@64b3e8bf issued 4 check-sat command(s) [2020-07-19 23:44:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:44:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-19 23:44:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:44:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:44:16,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:44:16,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2020-07-19 23:44:16,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957037979] [2020-07-19 23:44:16,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-19 23:44:16,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:44:16,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-19 23:44:16,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:44:16,215 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 40 states. [2020-07-19 23:44:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:44:16,444 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-07-19 23:44:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-19 23:44:16,444 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 82 [2020-07-19 23:44:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:44:16,446 INFO L225 Difference]: With dead ends: 92 [2020-07-19 23:44:16,446 INFO L226 Difference]: Without dead ends: 86 [2020-07-19 23:44:16,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-19 23:44:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-19 23:44:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-19 23:44:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-19 23:44:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-07-19 23:44:16,451 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-07-19 23:44:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:44:16,452 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-07-19 23:44:16,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-19 23:44:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-07-19 23:44:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-19 23:44:16,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:44:16,453 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:44:16,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-07-19 23:44:16,657 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:44:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:44:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-07-19 23:44:16,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:44:16,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281962609] [2020-07-19 23:44:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:44:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:44:17,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281962609] [2020-07-19 23:44:17,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536620368] [2020-07-19 23:44:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eeaa110 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:44:35,301 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eeaa110 issued 4 check-sat command(s) [2020-07-19 23:44:35,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:44:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 23:44:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:44:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:44:35,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:44:35,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2020-07-19 23:44:35,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800793923] [2020-07-19 23:44:35,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-19 23:44:35,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:44:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-19 23:44:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:44:35,409 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 41 states. [2020-07-19 23:44:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:44:35,682 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-07-19 23:44:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-19 23:44:35,682 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 84 [2020-07-19 23:44:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:44:35,683 INFO L225 Difference]: With dead ends: 94 [2020-07-19 23:44:35,683 INFO L226 Difference]: Without dead ends: 88 [2020-07-19 23:44:35,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:44:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-19 23:44:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-07-19 23:44:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 23:44:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-07-19 23:44:35,690 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-07-19 23:44:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:44:35,690 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-07-19 23:44:35,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-19 23:44:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-07-19 23:44:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-19 23:44:35,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:44:35,692 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:44:35,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-07-19 23:44:35,904 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:44:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:44:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-07-19 23:44:35,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:44:35,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267916293] [2020-07-19 23:44:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:44:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:44:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:44:36,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267916293] [2020-07-19 23:44:36,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979274212] [2020-07-19 23:44:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6337a99b 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 [2020-07-19 23:45:13,776 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6337a99b issued 4 check-sat command(s) [2020-07-19 23:45:13,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:45:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-19 23:45:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:45:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:45:13,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:45:13,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2020-07-19 23:45:13,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279283284] [2020-07-19 23:45:13,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-19 23:45:13,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:45:13,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-19 23:45:13,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:45:13,981 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 42 states. [2020-07-19 23:45:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:45:14,187 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-07-19 23:45:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-19 23:45:14,187 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 86 [2020-07-19 23:45:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:45:14,189 INFO L225 Difference]: With dead ends: 96 [2020-07-19 23:45:14,189 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 23:45:14,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-19 23:45:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 23:45:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-07-19 23:45:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-07-19 23:45:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-07-19 23:45:14,194 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-07-19 23:45:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:45:14,195 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-07-19 23:45:14,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-19 23:45:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-07-19 23:45:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-19 23:45:14,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:45:14,196 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:45:14,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-07-19 23:45:14,410 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:45:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:45:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-07-19 23:45:14,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:45:14,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681113038] [2020-07-19 23:45:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:45:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:45:15,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681113038] [2020-07-19 23:45:15,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468635956] [2020-07-19 23:45:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78810fad No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:45:57,334 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78810fad issued 4 check-sat command(s) [2020-07-19 23:45:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:45:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:45:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:45:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:45:57,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:45:57,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2020-07-19 23:45:57,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166105750] [2020-07-19 23:45:57,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-19 23:45:57,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:45:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-19 23:45:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:45:57,574 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 43 states. [2020-07-19 23:45:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:45:57,803 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-07-19 23:45:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-19 23:45:57,804 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2020-07-19 23:45:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:45:57,805 INFO L225 Difference]: With dead ends: 98 [2020-07-19 23:45:57,805 INFO L226 Difference]: Without dead ends: 92 [2020-07-19 23:45:57,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:45:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-19 23:45:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-07-19 23:45:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-19 23:45:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-07-19 23:45:57,810 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-07-19 23:45:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:45:57,811 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-07-19 23:45:57,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-19 23:45:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-07-19 23:45:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-19 23:45:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:45:57,812 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:45:58,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-07-19 23:45:58,015 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:45:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:45:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-07-19 23:45:58,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:45:58,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856050217] [2020-07-19 23:45:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:45:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:45:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:45:58,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856050217] [2020-07-19 23:45:58,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679812281] [2020-07-19 23:45:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5a4094 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 [2020-07-19 23:46:43,188 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c5a4094 issued 4 check-sat command(s) [2020-07-19 23:46:43,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:46:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-19 23:46:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:46:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:46:43,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:46:43,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2020-07-19 23:46:43,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007739785] [2020-07-19 23:46:43,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-19 23:46:43,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:46:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-19 23:46:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:46:43,477 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 44 states. [2020-07-19 23:46:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:46:43,750 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-07-19 23:46:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-19 23:46:43,751 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 90 [2020-07-19 23:46:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:46:43,752 INFO L225 Difference]: With dead ends: 100 [2020-07-19 23:46:43,753 INFO L226 Difference]: Without dead ends: 94 [2020-07-19 23:46:43,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 23:46:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-19 23:46:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-07-19 23:46:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-19 23:46:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-07-19 23:46:43,758 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-07-19 23:46:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:46:43,759 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-07-19 23:46:43,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-19 23:46:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-07-19 23:46:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-19 23:46:43,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:46:43,760 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:46:43,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:46:43,961 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:46:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:46:43,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-07-19 23:46:43,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:46:43,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609926216] [2020-07-19 23:46:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:46:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:46:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:46:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:46:45,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609926216] [2020-07-19 23:46:45,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821207320] [2020-07-19 23:46:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15c23015 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:47:27,723 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15c23015 issued 4 check-sat command(s) [2020-07-19 23:47:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:47:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 23:47:27,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:47:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:47:27,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:47:27,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2020-07-19 23:47:27,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062378431] [2020-07-19 23:47:27,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-19 23:47:27,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:47:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-19 23:47:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:47:27,987 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 45 states. [2020-07-19 23:47:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:47:28,141 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-07-19 23:47:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-19 23:47:28,141 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 92 [2020-07-19 23:47:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:47:28,142 INFO L225 Difference]: With dead ends: 102 [2020-07-19 23:47:28,142 INFO L226 Difference]: Without dead ends: 96 [2020-07-19 23:47:28,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:47:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-19 23:47:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-07-19 23:47:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-19 23:47:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-07-19 23:47:28,148 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-07-19 23:47:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:47:28,149 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-07-19 23:47:28,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-19 23:47:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-07-19 23:47:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-19 23:47:28,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:47:28,150 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:47:28,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:47:28,360 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:47:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:47:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-07-19 23:47:28,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:47:28,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899591188] [2020-07-19 23:47:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:47:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:47:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:47:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:47:29,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899591188] [2020-07-19 23:47:29,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830094373] [2020-07-19 23:47:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fa0e94 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 [2020-07-19 23:49:01,195 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fa0e94 issued 4 check-sat command(s) [2020-07-19 23:49:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:49:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-19 23:49:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:49:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:49:01,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:49:01,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2020-07-19 23:49:01,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087989387] [2020-07-19 23:49:01,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-19 23:49:01,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:49:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-19 23:49:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:49:01,731 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 46 states. [2020-07-19 23:49:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:49:01,969 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-07-19 23:49:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-19 23:49:01,970 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 94 [2020-07-19 23:49:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:49:01,972 INFO L225 Difference]: With dead ends: 104 [2020-07-19 23:49:01,972 INFO L226 Difference]: Without dead ends: 98 [2020-07-19 23:49:01,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-19 23:49:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-19 23:49:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-07-19 23:49:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-19 23:49:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-07-19 23:49:01,980 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-07-19 23:49:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:49:01,982 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-07-19 23:49:01,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-19 23:49:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-07-19 23:49:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-19 23:49:01,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:49:01,983 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:49:02,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-07-19 23:49:02,196 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:49:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:49:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-07-19 23:49:02,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:49:02,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291460419] [2020-07-19 23:49:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:49:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:49:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:49:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:49:03,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291460419] [2020-07-19 23:49:03,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215361354] [2020-07-19 23:49:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@308e434e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:27,085 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@308e434e issued 4 check-sat command(s) [2020-07-19 23:50:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:50:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 23:50:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:50:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:50:27,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:50:27,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2020-07-19 23:50:27,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146713972] [2020-07-19 23:50:27,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-19 23:50:27,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:50:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-19 23:50:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 23:50:27,580 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 47 states. [2020-07-19 23:50:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:50:27,810 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-07-19 23:50:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-19 23:50:27,811 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 96 [2020-07-19 23:50:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:50:27,812 INFO L225 Difference]: With dead ends: 106 [2020-07-19 23:50:27,812 INFO L226 Difference]: Without dead ends: 100 [2020-07-19 23:50:27,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 23:50:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-19 23:50:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-07-19 23:50:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-19 23:50:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-07-19 23:50:27,817 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-07-19 23:50:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:50:27,817 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-07-19 23:50:27,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-19 23:50:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-07-19 23:50:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-19 23:50:27,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:50:27,818 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:50:28,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:50:28,029 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:50:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:50:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-07-19 23:50:28,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:50:28,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159232795] [2020-07-19 23:50:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:50:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:50:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:50:29,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159232795] [2020-07-19 23:50:29,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596039419] [2020-07-19 23:50:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b6c03f2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:35,509 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b6c03f2 issued 4 check-sat command(s) [2020-07-19 23:52:35,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:52:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2020-07-19 23:52:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:52:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:52:36,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:52:36,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2020-07-19 23:52:36,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687362517] [2020-07-19 23:52:36,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-19 23:52:36,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:52:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-19 23:52:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 23:52:36,758 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 48 states. [2020-07-19 23:52:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:52:37,057 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-07-19 23:52:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-19 23:52:37,057 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 98 [2020-07-19 23:52:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:52:37,059 INFO L225 Difference]: With dead ends: 108 [2020-07-19 23:52:37,059 INFO L226 Difference]: Without dead ends: 102 [2020-07-19 23:52:37,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-19 23:52:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-19 23:52:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-07-19 23:52:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-19 23:52:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-07-19 23:52:37,063 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-07-19 23:52:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:52:37,064 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-07-19 23:52:37,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-19 23:52:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-07-19 23:52:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-19 23:52:37,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:52:37,065 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:52:37,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:52:37,266 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:52:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:52:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-07-19 23:52:37,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:52:37,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024164815] [2020-07-19 23:52:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:52:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:52:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:52:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:52:38,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024164815] [2020-07-19 23:52:38,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133050073] [2020-07-19 23:52:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79923f15 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:54:35,393 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79923f15 issued 4 check-sat command(s) [2020-07-19 23:54:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:54:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 23:54:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:54:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:54:36,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:54:36,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2020-07-19 23:54:36,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185234986] [2020-07-19 23:54:36,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-19 23:54:36,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:54:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-19 23:54:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-19 23:54:36,218 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 49 states. [2020-07-19 23:54:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:54:36,506 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-07-19 23:54:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-19 23:54:36,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 100 [2020-07-19 23:54:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:54:36,508 INFO L225 Difference]: With dead ends: 110 [2020-07-19 23:54:36,509 INFO L226 Difference]: Without dead ends: 104 [2020-07-19 23:54:36,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-19 23:54:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-19 23:54:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-07-19 23:54:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-19 23:54:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-07-19 23:54:36,516 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-07-19 23:54:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:54:36,516 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-07-19 23:54:36,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-19 23:54:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-07-19 23:54:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-19 23:54:36,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:54:36,517 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:54:36,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-07-19 23:54:36,729 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:54:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:54:36,729 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-07-19 23:54:36,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:54:36,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083132046] [2020-07-19 23:54:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4727f77a [2020-07-19 23:54:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:54:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:54:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:54:38,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083132046] [2020-07-19 23:54:38,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694814141] [2020-07-19 23:54:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@434e5fbe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true