/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:06:29,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:06:29,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:06:29,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:06:29,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:06:29,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:06:29,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:06:29,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:06:29,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:06:29,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:06:29,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:06:29,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:06:29,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:06:29,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:06:29,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:06:29,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:06:29,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:06:29,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:06:29,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:06:29,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:06:29,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:06:29,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:06:29,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:06:29,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:06:29,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:06:29,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:06:29,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:06:29,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:06:29,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:06:29,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:06:29,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:06:29,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:06:29,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:06:29,716 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:06:29,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:06:29,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:06:29,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:06:29,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:06:29,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:06:29,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:06:29,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:06:29,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:06:29,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:06:29,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:06:29,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:06:29,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:06:29,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:06:29,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:06:29,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:06:29,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:06:29,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:06:29,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:06:29,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:06:29,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:06:29,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:06:29,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:06:29,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:06:29,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:06:29,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:06:30,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:06:30,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:06:30,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:06:30,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:06:30,078 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:06:30,078 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 06:06:30,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71db9b065/9e374ab265594d3f88349e4af5ae8220/FLAGe4b2556a9 [2020-07-20 06:06:30,663 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:06:30,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-20 06:06:30,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71db9b065/9e374ab265594d3f88349e4af5ae8220/FLAGe4b2556a9 [2020-07-20 06:06:30,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71db9b065/9e374ab265594d3f88349e4af5ae8220 [2020-07-20 06:06:31,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:06:31,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:06:31,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:06:31,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:06:31,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:06:31,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:06:30" (1/1) ... [2020-07-20 06:06:31,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484f1148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31, skipping insertion in model container [2020-07-20 06:06:31,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:06:30" (1/1) ... [2020-07-20 06:06:31,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:06:31,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:06:31,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:06:31,288 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:06:31,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:06:31,466 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:06:31,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31 WrapperNode [2020-07-20 06:06:31,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:06:31,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:06:31,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:06:31,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:06:31,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... [2020-07-20 06:06:31,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:06:31,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:06:31,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:06:31,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:06:31,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:06:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:06:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:06:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:06:31,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-20 06:06:31,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:06:31,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-20 06:06:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:06:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:06:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-20 06:06:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-20 06:06:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:06:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 06:06:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 06:06:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:06:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:06:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:06:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:06:32,064 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:06:32,065 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-20 06:06:32,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:06:32 BoogieIcfgContainer [2020-07-20 06:06:32,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:06:32,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:06:32,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:06:32,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:06:32,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:06:30" (1/3) ... [2020-07-20 06:06:32,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abd705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:06:32, skipping insertion in model container [2020-07-20 06:06:32,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:31" (2/3) ... [2020-07-20 06:06:32,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17abd705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:06:32, skipping insertion in model container [2020-07-20 06:06:32,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:06:32" (3/3) ... [2020-07-20 06:06:32,080 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-20 06:06:32,091 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:06:32,100 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:06:32,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:06:32,139 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:06:32,140 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:06:32,140 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:06:32,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:06:32,141 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:06:32,141 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:06:32,141 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:06:32,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:06:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-20 06:06:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:06:32,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:32,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:32,167 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-20 06:06:32,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:32,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633756947] [2020-07-20 06:06:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:06:32,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633756947] [2020-07-20 06:06:32,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:06:32,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:06:32,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619259088] [2020-07-20 06:06:32,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:06:32,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:06:32,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:06:32,480 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-20 06:06:32,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:32,721 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-07-20 06:06:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:06:32,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-20 06:06:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:32,736 INFO L225 Difference]: With dead ends: 127 [2020-07-20 06:06:32,736 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 06:06:32,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:06:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 06:06:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-07-20 06:06:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 06:06:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 06:06:32,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-20 06:06:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:32,796 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 06:06:32,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:06:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 06:06:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:06:32,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:32,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:32,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:06:32,798 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-20 06:06:32,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:32,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307567068] [2020-07-20 06:06:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:06:32,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307567068] [2020-07-20 06:06:32,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:06:32,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:06:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878690039] [2020-07-20 06:06:32,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:06:32,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:06:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:06:32,961 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-20 06:06:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:33,126 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 06:06:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:06:33,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 06:06:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:33,128 INFO L225 Difference]: With dead ends: 40 [2020-07-20 06:06:33,128 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 06:06:33,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:06:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 06:06:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-07-20 06:06:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 06:06:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 06:06:33,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-20 06:06:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:33,138 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 06:06:33,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:06:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 06:06:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 06:06:33,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:33,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:33,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:06:33,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:33,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-20 06:06:33,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:33,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987236305] [2020-07-20 06:06:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:06:33,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987236305] [2020-07-20 06:06:33,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:06:33,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:06:33,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210051829] [2020-07-20 06:06:33,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:06:33,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:06:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:06:33,242 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-07-20 06:06:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:33,401 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 06:06:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:06:33,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 06:06:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:33,403 INFO L225 Difference]: With dead ends: 48 [2020-07-20 06:06:33,404 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 06:06:33,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:06:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 06:06:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-07-20 06:06:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 06:06:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-20 06:06:33,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-07-20 06:06:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:33,414 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-20 06:06:33,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:06:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-20 06:06:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 06:06:33,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:33,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:33,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:06:33,415 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:33,416 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-07-20 06:06:33,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:33,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264456662] [2020-07-20 06:06:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:06:33,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264456662] [2020-07-20 06:06:33,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:06:33,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 06:06:33,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138299831] [2020-07-20 06:06:33,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:06:33,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:06:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:06:33,597 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-07-20 06:06:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:33,864 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 06:06:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:06:33,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 06:06:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:33,866 INFO L225 Difference]: With dead ends: 37 [2020-07-20 06:06:33,867 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 06:06:33,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:06:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 06:06:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-20 06:06:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 06:06:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 06:06:33,883 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-07-20 06:06:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:33,884 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 06:06:33,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:06:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 06:06:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 06:06:33,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:33,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:33,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 06:06:33,886 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:33,887 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-07-20 06:06:33,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:33,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325900070] [2020-07-20 06:06:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 06:06:34,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325900070] [2020-07-20 06:06:34,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218431600] [2020-07-20 06:06:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57104125 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:34,128 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57104125 issued 2 check-sat command(s) [2020-07-20 06:06:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 06:06:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:06:34,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:34,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-20 06:06:34,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456992735] [2020-07-20 06:06:34,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:06:34,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:06:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:06:34,217 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-07-20 06:06:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:34,356 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-20 06:06:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:06:34,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-20 06:06:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:34,359 INFO L225 Difference]: With dead ends: 66 [2020-07-20 06:06:34,360 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 06:06:34,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:06:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 06:06:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-20 06:06:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 06:06:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-20 06:06:34,370 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-07-20 06:06:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:34,370 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-20 06:06:34,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:06:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-20 06:06:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 06:06:34,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:34,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:34,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:34,587 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-07-20 06:06:34,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:34,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871292602] [2020-07-20 06:06:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 06:06:34,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871292602] [2020-07-20 06:06:34,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685359081] [2020-07-20 06:06:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@276cc1e0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:34,761 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@276cc1e0 issued 2 check-sat command(s) [2020-07-20 06:06:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 06:06:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 06:06:34,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:34,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 06:06:34,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022729832] [2020-07-20 06:06:34,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:06:34,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:06:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:06:34,824 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 10 states. [2020-07-20 06:06:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:34,973 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-07-20 06:06:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:06:34,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 06:06:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:34,975 INFO L225 Difference]: With dead ends: 78 [2020-07-20 06:06:34,975 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 06:06:34,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:06:34,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 06:06:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-07-20 06:06:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 06:06:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-07-20 06:06:34,985 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-07-20 06:06:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:34,986 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-07-20 06:06:34,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:06:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-07-20 06:06:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 06:06:34,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:34,988 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:35,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:35,203 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-07-20 06:06:35,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:35,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109146434] [2020-07-20 06:06:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 06:06:35,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109146434] [2020-07-20 06:06:35,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456407431] [2020-07-20 06:06:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7063d5f9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:35,418 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7063d5f9 issued 2 check-sat command(s) [2020-07-20 06:06:35,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:35,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:06:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 06:06:35,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:35,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-20 06:06:35,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300829] [2020-07-20 06:06:35,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 06:06:35,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 06:06:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:06:35,520 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 12 states. [2020-07-20 06:06:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:35,697 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-07-20 06:06:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:06:35,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-07-20 06:06:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:35,699 INFO L225 Difference]: With dead ends: 90 [2020-07-20 06:06:35,699 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 06:06:35,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:06:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 06:06:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-07-20 06:06:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 06:06:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-07-20 06:06:35,709 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-07-20 06:06:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:35,710 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-07-20 06:06:35,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 06:06:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-07-20 06:06:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 06:06:35,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:35,712 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:35,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:35,919 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-07-20 06:06:35,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:35,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843170425] [2020-07-20 06:06:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-20 06:06:36,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843170425] [2020-07-20 06:06:36,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199807870] [2020-07-20 06:06:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28a55eb1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:36,180 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28a55eb1 issued 2 check-sat command(s) [2020-07-20 06:06:36,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:36,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:06:36,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 74 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-07-20 06:06:36,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:36,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-20 06:06:36,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594923326] [2020-07-20 06:06:36,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:06:36,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:06:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:06:36,294 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-07-20 06:06:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:36,472 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-07-20 06:06:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:06:36,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-07-20 06:06:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:36,474 INFO L225 Difference]: With dead ends: 102 [2020-07-20 06:06:36,474 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 06:06:36,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:06:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 06:06:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 06:06:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 06:06:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-07-20 06:06:36,485 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-07-20 06:06:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:36,486 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-07-20 06:06:36,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:06:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-07-20 06:06:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 06:06:36,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:36,488 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:36,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:36,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-07-20 06:06:36,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:36,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822071296] [2020-07-20 06:06:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-07-20 06:06:36,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822071296] [2020-07-20 06:06:36,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671726264] [2020-07-20 06:06:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de3797c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:37,107 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5de3797c issued 2 check-sat command(s) [2020-07-20 06:06:37,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 06:06:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 06:06:37,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:37,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2020-07-20 06:06:37,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133120009] [2020-07-20 06:06:37,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 06:06:37,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 06:06:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:06:37,237 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 16 states. [2020-07-20 06:06:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:37,475 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2020-07-20 06:06:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:06:37,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-07-20 06:06:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:37,476 INFO L225 Difference]: With dead ends: 114 [2020-07-20 06:06:37,477 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 06:06:37,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:06:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 06:06:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-20 06:06:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 06:06:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-07-20 06:06:37,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-07-20 06:06:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:37,501 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-07-20 06:06:37,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 06:06:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-07-20 06:06:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 06:06:37,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:37,505 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:37,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:37,706 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:37,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:37,707 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-07-20 06:06:37,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:37,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556913662] [2020-07-20 06:06:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 06:06:37,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556913662] [2020-07-20 06:06:37,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766601165] [2020-07-20 06:06:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cdac19e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:38,071 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cdac19e issued 3 check-sat command(s) [2020-07-20 06:06:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:06:38,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-20 06:06:38,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:38,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 06:06:38,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992304211] [2020-07-20 06:06:38,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:06:38,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:06:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:06:38,124 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 8 states. [2020-07-20 06:06:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:38,344 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-07-20 06:06:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:06:38,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-20 06:06:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:38,347 INFO L225 Difference]: With dead ends: 168 [2020-07-20 06:06:38,347 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 06:06:38,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:06:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 06:06:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-07-20 06:06:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-20 06:06:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-07-20 06:06:38,359 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-07-20 06:06:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:38,359 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-07-20 06:06:38,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:06:38,360 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-07-20 06:06:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 06:06:38,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:38,361 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:38,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:38,577 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-07-20 06:06:38,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:38,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609877832] [2020-07-20 06:06:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 06:06:38,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609877832] [2020-07-20 06:06:38,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404277008] [2020-07-20 06:06:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36188082 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:39,486 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36188082 issued 4 check-sat command(s) [2020-07-20 06:06:39,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 06:06:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:39,523 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:06:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 06:06:39,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:39,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-07-20 06:06:39,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388441274] [2020-07-20 06:06:39,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:06:39,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:06:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:06:39,550 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 10 states. [2020-07-20 06:06:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:39,777 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-07-20 06:06:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:06:39,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-20 06:06:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:39,787 INFO L225 Difference]: With dead ends: 109 [2020-07-20 06:06:39,789 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 06:06:39,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:06:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 06:06:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-07-20 06:06:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 06:06:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-07-20 06:06:39,807 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-07-20 06:06:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:39,808 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-07-20 06:06:39,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:06:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-07-20 06:06:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 06:06:39,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:39,810 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:40,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:40,024 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-07-20 06:06:40,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:40,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470537182] [2020-07-20 06:06:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-07-20 06:06:40,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470537182] [2020-07-20 06:06:40,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388347138] [2020-07-20 06:06:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e7f6048 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:41,180 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e7f6048 issued 3 check-sat command(s) [2020-07-20 06:06:41,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 06:06:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 231 proven. 297 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-07-20 06:06:41,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:41,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 06:06:41,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416259155] [2020-07-20 06:06:41,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 06:06:41,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:41,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 06:06:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:06:41,272 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 13 states. [2020-07-20 06:06:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:41,649 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-07-20 06:06:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:06:41,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 102 [2020-07-20 06:06:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:41,652 INFO L225 Difference]: With dead ends: 181 [2020-07-20 06:06:41,652 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 06:06:41,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 06:06:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 06:06:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-07-20 06:06:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 06:06:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-07-20 06:06:41,669 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 102 [2020-07-20 06:06:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:41,670 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-07-20 06:06:41,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 06:06:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-07-20 06:06:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 06:06:41,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:41,678 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:41,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 06:06:41,880 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:41,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 9 times [2020-07-20 06:06:41,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:41,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112027149] [2020-07-20 06:06:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-07-20 06:06:42,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112027149] [2020-07-20 06:06:42,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714258625] [2020-07-20 06:06:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28d4635f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:47,437 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28d4635f issued 3 check-sat command(s) [2020-07-20 06:06:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:06:47,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 06:06:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:06:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 254 proven. 768 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 06:06:47,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:06:47,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-07-20 06:06:47,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668985148] [2020-07-20 06:06:47,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 06:06:47,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:06:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 06:06:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-07-20 06:06:47,609 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 16 states. [2020-07-20 06:06:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:06:48,076 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2020-07-20 06:06:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 06:06:48,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-07-20 06:06:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:06:48,078 INFO L225 Difference]: With dead ends: 212 [2020-07-20 06:06:48,078 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 06:06:48,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-07-20 06:06:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 06:06:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2020-07-20 06:06:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 06:06:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-07-20 06:06:48,090 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 135 [2020-07-20 06:06:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:06:48,091 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-07-20 06:06:48,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 06:06:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-07-20 06:06:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-20 06:06:48,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:06:48,093 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 26, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:06:48,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:06:48,294 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:06:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:06:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1900915656, now seen corresponding path program 10 times [2020-07-20 06:06:48,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:06:48,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558668181] [2020-07-20 06:06:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:06:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:06:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-07-20 06:06:48,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558668181] [2020-07-20 06:06:48,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545366057] [2020-07-20 06:06:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@455585fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:28,818 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@455585fe issued 3 check-sat command(s) [2020-07-20 06:07:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:07:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 06:07:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:07:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 219 proven. 1454 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-07-20 06:07:29,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:07:29,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-07-20 06:07:29,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956615787] [2020-07-20 06:07:29,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 06:07:29,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:07:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 06:07:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 06:07:29,045 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 19 states. [2020-07-20 06:07:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:07:29,609 INFO L93 Difference]: Finished difference Result 243 states and 283 transitions. [2020-07-20 06:07:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 06:07:29,611 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 168 [2020-07-20 06:07:29,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:07:29,613 INFO L225 Difference]: With dead ends: 243 [2020-07-20 06:07:29,613 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 06:07:29,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-07-20 06:07:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 06:07:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-07-20 06:07:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-20 06:07:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 231 transitions. [2020-07-20 06:07:29,626 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 231 transitions. Word has length 168 [2020-07-20 06:07:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:07:29,626 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 231 transitions. [2020-07-20 06:07:29,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 06:07:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 231 transitions. [2020-07-20 06:07:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 06:07:29,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:07:29,629 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 31, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:07:29,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:07:29,830 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:07:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:07:29,831 INFO L82 PathProgramCache]: Analyzing trace with hash 948653961, now seen corresponding path program 11 times [2020-07-20 06:07:29,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:07:29,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271755968] [2020-07-20 06:07:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5d864f [2020-07-20 06:07:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:07:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-07-20 06:07:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271755968] [2020-07-20 06:07:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2934380] [2020-07-20 06:07:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c165b09 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